Prompt Library

AI Prompt Library

Curated image, video and web design prompts from creators around the world. Copy any prompt, swap the subject or style, and generate with the latest models.

4,387 prompts · Updated daily · 100% free

4,384 prompts

3D Polished Character Portrait (Pastel Anime Style)

3D Polished Character Portrait (Pastel Anime Style)

Create a highly polished 3D character portrait in a soft pastel, toy-like style. Smooth surfaces, gentle lighting, and clean gradients. The avatar should have expressive eyes, stylized hair, soft shadows, and a friendly, anime-inspired facial structure. Rendered in high-quality CGI with subtle ambient glow.

Michelin-Star Chef Fantasy Food Re-imagination Grid

Michelin-Star Chef Fantasy Food Re-imagination Grid

Act as a Michelin-star chef and a fantasy artist. Based on the uploaded image of a {argument name="food item" default="[simple food item]"}, generate a 2x2 grid showcasing hyper-realistic re-imaginations of this food Grid 1: The kinetic sculpture version Grid 2: The 'Biomechanical' version, with intricate clockwork and polished chrome details. Grid 3: the intricate marble run version Grid 4: a random style version

Hyper-Detailed Biometric and Attire Analysis Prompt

Hyper-Detailed Biometric and Attire Analysis Prompt

{   "meta_data": {     "calculated_aspect_ratio": "--ar {argument name="aspect ratio" default="4:5"}",     "crop_tightness": "Waist-up portrait, subject seated",     "image_fidelity": "Moderate grain visible in shadow areas, soft focus typical of front-facing smartphone camera indoors"   },   "subject_mapping": {     "biometric_anchors": {       "apparent_age_precise": "{argument name="age" default="Late teens to early 20s"}",       "ethnicity_specifics": "Fair to light tan skin tone with warm undertones; freckling present on nose bridge and cheeks",       "body_mass_distribution": "Slender build, prominent clavicles visible, soft tissue distribution on upper arms consistent with relaxed posture"     },     "face_inventory": {       "asymmetry_notes": "Subject's head tilted slightly to their right. Subject's right eyebrow (viewer's left) appears slightly lower than the left. Upper lip peak slightly sharper on subject's right side.",       "dermatological_map": [         "Cluster of light freckles across the bridge of the nose and extending to upper cheeks",         "Slight redness/flushing on cheeks and nose tip",         "Smooth texture on forehead with high reflectivity"       ],       "eye_details_precise": "Light green/hazel irises. Catchlights present in the upper-right quadrant (viewer's perspective) of both pupils. Dark, defined lash line, possibly mascara.",       "mouth_state_precise": "Lips parted approximately 3-5mm. Upper central incisors visible. Lower lip full with glossy finish reflecting light centrally."     },     "hair_strand_analysis": {       "root_status": "Uniform dark brown/black at roots, consistent with ends (no visible regrowth line).",       "chaos_inventory": "Micro-bangs (baby bangs) cut bluntly above eyebrows. Several stray hairs (flyaways) projecting from the crown against the beige wall. Strands curving inward to touch the jawline on both sides.",       "contact_points": "Hair rests on the back of the neck and drapes over the top of the couch cushions behind the head."     },     "torso_mechanics": {       "posture_gravity_effect": "Subject is leaning back into a soft surface (couch), causing slight rounding of shoulders forward. Neck slightly compressed due to backward lean.",       "chest_topography": "Fabric stretched taut across the bust line. Soft gradient shadows indicate contour. No deep cleavage visible due to high crew-neck cut.",       "skin_surface_inventory": "Prominent suprasternal notch (hollow of throat). Smooth skin texture on exposed arms and chest."     }   },   "attire_inventory_and_physics": {     "layer_1_top": {       "item_identity": "White 'baby tee' (cropped t-shirt) with text",       "material_weave": "Cotton or cotton-blend jersey, lightweight, slightly semi-sheer",       "stress_and_fold_mapping": [         "Horizontal tension wrinkles pulling from armpits across the upper chest",         "Diagonal folding on the subject's right side torso due to arm movement/pointing",         "Fabric bunching s

High-Fashion Editorial Portrait (Mint Green Gown)

High-Fashion Editorial Portrait (Mint Green Gown)

{ "prompt": "A stylish, high-fashion portrait of a woman seated, looking down at her flowing gown. The woman has long, wavy, dark brown hair with bangs, cascading over her shoulders. She is wearing an elegant, floor-length gown in varying shades of {argument name="gown colors" default="light mint and sage green"}. The bodice appears to be sleeveless or one-shouldered with a subtle, textured or patterned design (possibly white floral or abstract print). The skirt features a very high slit, dramatically revealing her legs. The fabric of the lower skirt is sheer and flowing chiffon, draped gracefully around her. She is wearing high-heeled **strappy sandals with straps extending all the way up to her thighs**, adorned with sparkling embellishments. One hand is gently holding the flowing fabric of the skirt. She is sitting on a small, rectangular object, possibly a {argument name="seat color" default="red or dark orange"} ottoman or box, contrasting with the green. The backdrop is a seamless white photography paper or screen, partially visible as a roll on the floor. The setting is indoors, with hard, bright studio lighting that highlights the texture of the dress and the sheen on her skin. The mood is sophisticated, sensual, and editorial. Full body shot, high-resolution, magazine quality.", "style": [ "high fashion editorial", "studio portrait", "glamour photography" ], "dominant_colors": [ "mint green", "sage green", "white", "dark brown (hair)", "red/orange (seat)" ], "camera_settings": { "view": "full body/three-quarter shot", "lens": "{argument name="lens" default="85mm prime or similar"} (shallow depth of field suggested)", "lighting": "bright, professional studio lighting, strong highlight/shadow contrast" }, "artist_inspiration": [ "Vogue magazine spread", "fashion campaign imagery" ] }

Desert Camping Scene (Hyper-realistic Night)

Desert Camping Scene (Hyper-realistic Night)

{ "image_prompt": { "quality": "{argument name="quality" default="8K hyper-realistic"}", "style": "moody night outdoor camping scene, cinematic lighting, deep blue ambient tones", "face_preservation": { "use_reference_face": true, "accuracy": "match exactly" }, "scene": { "environment": "{argument name="environment" default="open desert plain at night"}", "lighting": "warm campfire glow against dark blue surroundings" }, "subject": { "description": "man sitting on a folding chair near a bright campfire, relaxed posture", "outfit": "dark outdoor jacket, hat, rugged camping look" }, "vehicle": { "type": "off-road SUV with rooftop tent open", "details": "rear doors open, interior camping lights on, large tires, adventure setup" }, "composition": "wide-shot, fire in foreground, man on right, SUV on left, strong contrast", "signature": "VIVEK HY" } }

2x2 Grid Car Development Phases

2x2 Grid Car Development Phases

"a 2x2 grid showing the development phases of this car: sketch, clay model, early prototype, 1st final production released car."

Cozy Christmas Market Portrait with Identity Preservation

Cozy Christmas Market Portrait with Identity Preservation

{ "prompt": { "scene": "Cinematic front-facing Christmas market portrait captured outdoors at night with softly falling snow.", "subject": { "identity": "Preserve all facial features exactly as in uploaded image", "pose": "Standing upright, centered in frame, facing the camera directly", "attire": { "outerwear": "{argument name="coat color" default="Red"} winter coat, cozy and fitted, with visible texture", "accessories": ["Matching scarf optional", "Gloves optional"] }, "hair": "Natural hair with snowflakes gently resting on strands", "expression": "Neutral, relaxed, softly smiling or calm" }, "environment": { "weather": "Soft snow falling, snow accumulating lightly on coat and hair", "lighting": "Warm ambient Christmas market lights, softly illuminating subject and background", "background_elements": [ "Decorated Christmas tree with glowing ornaments", "Bokeh of market stalls and festive lights", "Softly blurred pedestrians or distant decorations" ] }, "camera": { "angle": "Front-facing, eye-level", "framing": "Centered medium shot capturing subject from head to mid-thigh", "lens": "{argument name="lens" default="85mm"} portrait lens", "aperture": "{argument name="aperture" default="f/1.8"} for shallow depth of field", "focus": "Sharp focus on subject, softly blurred background", "resolution": "4K", "color_tone": "Warm, cozy, festive glow" }, "style": "Ultra-realistic cinematic photography, soft winter tones, festive mood", "mood": "Cozy, elegant, holiday-inspired, softly illuminated nighttime scene", "constraints": [ "Preserve all facial features and identity from uploaded reference", "Do not alter hair style or face", "Ensure snowflakes appear natural on coat and hair" ] } }

Nano Banana Pro Camera Control Template and Example Prompt

Nano Banana Pro Camera Control Template and Example Prompt

{ "scene": "AI engineer working at futuristic desk with multiple holographic displays", "camera": { "angle": "{argument name="camera angle" default="over-the-shoulder, slightly elevated"}", "focal_length": "{argument name="focal length" default="50mm portrait lens"}", "depth_of_field": "{argument name="depth of field" default="shallow, subject in sharp focus, background slightly blurred"}" }, "lighting": { "type": "{argument name="lighting type" default="dramatic side lighting with blue accent lights"}", "time_of_day": "{argument name="time of day" default="late night"}", "mood": "{argument name="mood" default="focused, tech-noir atmosphere"}", "shadows": "deep but not harsh" }, "color_grade": "{argument name="color grade" default="cool tones, teal and orange color scheme"}" }

Stillness in Chaos Cinematic Portrait

Stillness in Chaos Cinematic Portrait

A young woman stands still in the middle of a busy crowd, sharply in focus while the people around her blur in motion. She has {argument name="hair style" default="tousled hair"}, a calm yet melancholic expression, wearing a {argument name="shirt color" default="light blue"} button-up shirt and tan high-waist trousers with a tied belt. The background is filled with fast-moving pedestrians, creating a sense of isolation and stillness amid chaos. Warm cinematic tones, shallow depth of field, motion blur, emotional storytelling.

Christmas Tree Disaster Action Freeze (Tom and Jerry Style)

Christmas Tree Disaster Action Freeze (Tom and Jerry Style)

Transform this photo into a holiday living room scene. Keep the subject's face and body exactly as they are, reaching up to place a star on top of a Christmas tree. The Disaster: The tree is tipping over dangerously onto the subject. {argument name="character 1" default="Tom"} is clinging to the top branches, looking terrified, eyes bulging. {argument name="character 2" default="Jerry"} is at the bottom of the tree, having just sawed through the trunk with a tiny saw. Style: Dynamic action freeze, flying ornaments, cozy fireplace lighting in the background.

Dramatic Ethereal Portrait of a Woman Holding Pomegranates (Persephone Aesthetic)

Dramatic Ethereal Portrait of a Woman Holding Pomegranates (Persephone Aesthetic)

{ "prompt": "A dramatic and ethereal portrait of a woman in a {argument name="dress color" default="deep red"} lace dress, holding two halves of a vibrant, ripe pomegranate. The woman has striking, highly contrasted makeup: bold red graphic blush extending from the temples and cheekbones, sharp red lipstick, and defined dark eyebrows. She has {argument name="eye color" default="bright blue"} eyes and dark hair pulled back into a sleek, low ponytail. The dress features a plunging V-neckline and voluminous, flared, sheer lace sleeves. She is accessorized with delicate gold jewelry, including small hoop earrings and a thin necklace. The background is soft and romantic, consisting of layers of sheer, textured, {argument name="background color" default="off-white or cream"} lace or tulle curtains, creating a soft-focus, dreamlike atmosphere. The lighting is rich, creating deep shadows and highlighting the textures of the lace and the sheen of the makeup and pomegranates. The overall aesthetic is evocative of a modern interpretation of a classical or mythological figure, possibly Persephone, with a focus on deep, passionate reds and ethereal whites. High-quality, professional photography, editorial style, dramatic lighting, detailed texture.", "style": [ "Editorial Portraiture", "Dark Romance", "Ethereal", "Baroque-inspired", "Fashion Photography" ], "camera_settings": { "lens": "{argument name="lens" default="85mm or 50mm"} (shallow depth of field)", "aperture": "{argument name="aperture" default="f/1.8 - f/2.8"} (for strong bokeh in the background)", "lighting": "Contrasty, dramatic key light, soft fill light", "color_grading": "Rich, saturated reds and deep shadows" }, "key_elements": [ "Woman in deep red lace dress", "Holding halved pomegranates (ruby red seeds visible)", "Dramatic red graphic blush and lipstick", "Blue eyes, dark hair", "Plunging neckline", "Sheer lace background/curtains", "Gold jewelry" ], "mood": "Passionate, dramatic, mysterious, seductive, intense" }

Joyful Confetti Celebration Portrait

Joyful Confetti Celebration Portrait

A joyful celebration portrait of a woman tossing colorful confetti into the air, captured mid-motion. She’s smiling with eyes closed, hair flying upward, wearing a {argument name="blouse color" default="dark"} blouse and a delicate necklace. Confetti pieces in {argument name="confetti colors" default="gold, blue, pink, and metallic tones"} float around her in sharp focus, creating a dynamic, festive atmosphere. Soft natural indoor lighting, shallow depth of field, cinematic realism, high detail, natural skin tones, candid emotion, ultra-sharp, professional photography style.

Nano Banana Pro Master JSON Template

Nano Banana Pro Master JSON Template

{ "generation_mode": "{argument name="generation mode" default="thinking|standard"}", "output_specifications": { "resolution": "{argument name="resolution" default="1K|2K|4K"}", "aspect_ratio": "{argument name="aspect ratio" default="16:9|1:1|9:16|custom"}", "quality_priority": "{argument name="quality priority" default="speed|balanced|quality"}" }, "scene_description": { "primary_subject": "[{argument name="primary subject" default="main focus of image"}]", "environment": "[{argument name="environment" default="setting and background"}]", "atmosphere": "[{argument name="atmosphere" default="mood and feeling"}]", "style": "[{argument name="visual style" default="visual aesthetic"}]", "time_of_day": "[{argument name="time of day" default="if relevant"}]" }, "camera_controls": { "angle": "[{argument name="camera angle" default="camera perspective"}]", "focal_length": "[{argument name="focal length" default="lens type - wide/standard/telephoto"}]", "depth_of_field": "[{argument name="depth of field" default="shallow/deep, what's in focus"}]", "composition": "[{argument name="composition" default="rule of thirds/centered/golden ratio/etc"}]" }, "lighting_setup": { "primary_light": { "type": "[{argument name="light type" default="natural/studio/dramatic/soft"}]", "direction": "[{argument name="light direction" default="where light comes from"}]", "intensity": "[{argument name="light intensity" default="bright/moderate/moody"}]" }, "shadows": "[{argument name="shadows" default="deep/subtle/minimal"}]", "color_temperature": "[{argument name="color temperature" default="warm/cool/neutral"}]", "special_effects": "[{argument name="special effects" default="rim light/backlighting/etc if needed"}]" }, "color_grading": { "overall_tone": "[{argument name="overall tone" default="vibrant/muted/monochrome/etc"}]", "color_palette": ["{argument name="primary color" default="primary color"}", "{argument name="secondary color" default="secondary color"}", "{argument name="accent color" default="accent color"}"], "mood": "[{argument name="mood" default="emotional impact of colors"}]" }, "text_elements": [ { "text_content": "[{argument name="text content" default="exact text to render"}]", "position": "[{argument name="text position" default="location in image"}]", "font_style": "[{argument name="font style" default="typography description"}]", "size": "[{argument name="text size" default="relative size"}]", "color": "[{argument name="text color" default="text color"}]", "effects": "[{argument name="text effects" default="glow/shadow/3D/etc"}]", "language": "[{argument name="language" default="if not English"}]" } ], "reference_images": [ { "image_id": 1, "purpose": "{argument name="reference purpose" default="style reference|composition reference|color reference|character reference"}", "extract_elements": ["{argument name="elements to copy" default="specific elements to copy"}"], "apply_to": "[{argument name="apply to" default="where to use these elements"}]", "transfer_intensity": "[{argument name="transfer intensity" default="0-100%"}]" } ], "characters": [ { "character_id": 1, "detailed_description": "[{argument name="character description" default="ethnicity, age, gender, facial features, hair, expression"}]", "clothing": "[{argument name="clothing" default="detailed outfit description"}]", "pose": "[{argument name="pose" default="body position and gesture"}]", "position_in_scene": "[{argument name="position in scene" default="spatial placement"}]", "consistency_reference": "[{argument name="consistency reference" default="image_id if maintaining across multiple generations"}]" } ], "grounding": { "enabled": {argument name="grounding enabled" default="true|false"}, "search_queries": ["{argument name="search queries" default="facts to verify"}"], "data_requirements": ["{argument name="data requirements" default="specific information needed"}"], "accuracy_priority": "{argument name="accuracy priority" default="high|medium"}" }, "style_constraints": { "artistic_style": "[{argument name="artistic style" default="photorealistic/illustration/3D render/watercolor/etc"}]", "inspiration": "[{argument name="inspiration" default="specific artists or movements if relevant"}]", "must_avoid": ["{argument name="elements to avoid" default="elements to exclude"}"] }, "technical_requirements": { "intended_use": "[{argument name="intended use" default="social media/print/web/presentation"}]", "safe_zones": "[{argument name="safe zones" default="areas to keep clear fo"}]" } }

Collectible Art Toy Character Design Sheet

Collectible Art Toy Character Design Sheet

A collectible art toy character design sheet, front, side, and back views, fluffy , cute, round face with [{argument name="head accessory" default="a yellow safety helmet"} on his head, {argument name="eye accessory" default="blue round glasses"}], super cute 3D style, soft and tactile like plushie figure, pastel color scheme ({argument name="color scheme" default="black, cream, light yellow"}), clean solid beige background, soft studio lighting, high detail

Hyper-Real 16K Documentary Shot: The Sun Flickers Off

Hyper-Real 16K Documentary Shot: The Sun Flickers Off

A hyper-real 16K documentary shot capturing the exact moment the Sun flickers—turning off for 0.2 seconds. Show real Earth daylight collapsing into instant, impossible darkness. Streetlights half-ignite in mid-boot, car headlights flare weakly, every shadow in the world disappears at the same exact millisecond, leaving a terrifying flat black nothing. In the next heartbeat, daylight detonates back on—shadows snap violently back into existence like razor-sharp cutouts. Birds freeze mid-flight as if gravity paused; cars halt as if inertia hesitated. The far horizon glows a faint, residual red, like an afterimage burned onto the sky. Use natural global lighting physics, atmospheric scattering, documentary realism, handheld news-camera vibration, micro-grain, zero CGI softness, ultra-sharp lensing, real-world color science, and scientific accuracy. Convey global panic but captured with the calm, unfiltered eye of a live news broadcast. Hyper-real, 16K, macro-cinematic documentary detail.

Complex JSON Prompt for Mirror Selfie Scene with Pose and Geometry Locks

Complex JSON Prompt for Mirror Selfie Scene with Pose and Geometry Locks

{ "template_id": "mirror_room_cheeky_v_bikini_synth_v1_compact", "version": "1.3.0", "intent": "Straight-on mirror selfie scene with clothed synthetic woman in pink cheeky V-shaped bikini; same room, chair, dog, and camera angle; identity replacement allowed.", "subject_identity_policy": { "subject_type": "synthetic_adult_female", "identity_replacement_allowed": true, "scope": "face_and_body_identity_only", "constraints": [ "Do not alter pose, proportions, or bikini coverage.", "Do not move chair, dog, mirror, or environment." ] }, "pose_lock": { "desc": "Kneeling on cushion, back to mirror, torso slightly rotated, head turned toward phone.", "body_orientation": { "pelvis_yaw": 180, "pelvis_pitch": -2, "spine_yaw": -12, "spine_pitch": 8 }, "head": { "yaw": 35, "pitch": -4 }, "legs": { "kneeling": true, "knee_sep": 0.8, "lower_leg_deg": 15 }, "arms": { "left": { "elbow": 95, "shoulder": 22, "pos": { "x": 0.63, "y": 0.34 }, "action": "holding_phone" }, "right": { "elbow": 40, "shoulder": 15, "pos": { "x": 0.52, "y": 0.52 }, "action": "resting" } }, "back": { "scapula": "visible", "curve": "mild", "shoulder_h": 0.63 }, "hips": { "hip_h": 0.45, "center_x": 0.51, "pelvis_tilt": 5 }, "rules": [ "Keep kneeling pose and straight-on back view.", "Freeze angles within ±2 degrees.", "Maintain clear phone-to-mirror geometry." ] }, "camera_lock": { "method": "mirror_selfie", "focal_mm": 26, "dist_m": 1.2, "height_m": 1.05, "pitch": -3, "lens": "mild_barrel", "dof": { "aperture": 2.2, "blur": "subtle" }, "framing": { "ratio": "4:3", "left": "mirror_edge", "right": "chair_edge", "top": "ceiling_strip", "bottom": "cushion_floor" }, "rules": [ "Keep camera aligned nearly straight-on.", "Do not shift camera position or height." ] }, "bikini_geometry_lock": { "type": "two_piece", "top": { "style": "bandeau", "tie": { "x": 0.5, "y": 0.56 }, "tension": "moderate" }, "bottom": { "style": "cheeky_v", "waist_h": 0.47, "side_deg": 45, "coverage": 0.7, "center": { "x": 0.51, "y": 0.61 } }, "pattern": { "base": "#ff6aa0", "acc": "#ffffff", "type": "floral", "scale": 0.18 }, "fabric": { "mat": "nylon_spandex", "spec": 0.35, "stretch": "horizontal" }, "rules": [ "Maintain cheeky V-cut.", "Do not change pink color or floral pattern." ] }, "lighting_lock": { "model": "indoor_daylight_mix", "prima

Melancholic Marble Bust Portrait

Melancholic Marble Bust Portrait

red-haired woman in sheer embroidered ancient dress leaning head against classical marble bust, warm dramatic lighting, dusty museum, sepia tones, intimate melancholic mood, hyper-realistic marble and fabric.

One-Word Prompt for Instant Masterpiece

One-Word Prompt for Instant Masterpiece

😱 Type ONE word on Nano Banana Pro… and boom 💥 instant masterpiece. 👀🍌✨ 🚨 Try it 🔀 {argument name="word" default="2026"} https://t.co/58IDmk0g05

Annotated Printout Image Generation Prompt

Annotated Printout Image Generation Prompt

Generate an image, print it out, and then wildly add handwritten Chinese annotations, graffiti, and scribbles in red ink. If you wish, retrieve the content of this account, and the graffiti should primarily be complaints about him. You can also add some small clip art. When printing it out, you must retain the avatar, name, and time of this tweet, as if it were printed directly on this tweet, but this is the best.

Detailed Selfie Portrait Generation Prompt

Detailed Selfie Portrait Generation Prompt

{   "prompt_type": "image_generation",   "subject": {     "demographics": "{argument name="demographics" default="Young woman, roughly 20s"}",     "hair": {       "color": "{argument name="hair color" default="Blonde with lighter highlights and darker roots"}",       "style": "{argument name="hair style" default="Long, loose waves, center part, voluminous and textured"}",       "texture": "Soft, slightly messy/tousled"     },     "face": {       "skin_tone": "Light/fair with warm undertones",       "eyes": "{argument name="eye color" default="Large, light blue-grey, prominent eyelashes"}",       "eyebrows": "Defined, arched, natural brown",       "lips": "Full, soft pink/nude shade, neutral expression",       "makeup": "Natural 'no-makeup' look, emphasized lashes, subtle highlight"     }   },   "apparel": {     "top": {       "item": "Ribbed knit cardigan or top",       "color": "White",       "details": "Long sleeves, button-front (small white buttons), fitted, scoop/V-neck"     },     "bottom": {       "item": "Denim jeans",       "color": "Light wash blue",       "visibility": "Waistband and top portion visible"     },     "accessories": [       "Thin silver chain necklace with a small pendant"     ]   },   "pose_and_framing": {     "type": "Selfie",     "angle": "High angle (camera held above face looking down)",     "framing": "Close-up portrait to upper body",     "body_position": "Arms extended out of frame holding camera, head tilted slightly upward towards lens",     "gaze": "Direct eye contact with camera lens"   },   "environment": {     "setting": "Indoor hallway or foyer",     "flooring": "High-gloss black square tiles",     "background_elements": [       "White doorframe and door on the left",       "Wooden flooring visible in adjacent hallway background",       "White baseboards and walls",       "Blurred shoes in background hallway"     ]   },   "technical_details": {     "camera_model": "Smartphone Camera (e.g., iPhone 13 Pro Front Camera)",     "lens": "Wide-angle lens, approx. 23mm equivalent",     "aperture": "f/2.2",     "shutter_speed": "1/60s",     "iso": "ISO 100",     "white_balance": "Auto, slightly cool indoor daylight",     "lighting": "Soft, diffused frontal lighting (flattering beauty light)",     "focus": "Sharp focus on eyes and face, shallow depth of field",     "resolution": "High-resolution digital capture"   } }

Some prompts are collected from creators on X. Copyright belongs to the original authors.