HN Showcase
Back to browse
AIWriteBook – AI tool to write, design, and publish full-length books

AIWriteBook – AI tool to write, design, and publish full-length books

by marakaci·Feb 15, 2026·3 points·2 comments
Visit ProjectView on HN

AI Analysis

●●SolidSolve My ProblemCrowd PleaserShip It

End-to-end book pipeline, but AI writing tools and publishing dashboards already exist separately.

Strengths
  • •Consolidates fragmented workflow (outline → writing → cover → audiobook → KDP export) into one tool
  • •Voice-matching for chapters based on uploaded author samples is a smart personalization angle
  • •Free tier substantial (7 full chapters + generators) removes friction to try the product
Weaknesses
  • •Audiobook narration, cover design, and KDP optimization are commoditized features (many tools do each individually)
  • •Core value is orchestration, not novel technology—authors still need to verify AI output quality before publishing
Category
SaaS
Target Audience

Self-published authors, indie writers, and anyone publishing to KDP or other platforms

Similar To

Vellum (formatting/publishing) · Atticus (book layout/export) · Sudowrite (AI-assisted writing)

Post Description

hey HN, I built this. AIWriteBook takes you from a book idea to a finished, publishable book (outline, chapters, cover, illustrations, audiobook, and KDP ready export) in one tool.

You can try it right away: the free tools (title generator, plot generator, character creator) work without signing up. Also, free account gives you a full 7 chapter book, no credit card.

I run a small publishing platform (NanoReads, 130+ published books, 341K readers). I kept seeing authors juggle 5 to 7 tools to publish one book: outliner, writing tool, Vellum ($250) for formatting, cover designer, TTS for audiobooks, keyword tool for Amazon. Nothing covers the full journey.

How it works: you enter a title and basic info. AI generates a structured outline with characters (arcs, motivations, voice) and a chapter by chapter story bible (events, locations, twists). You edit the outline (most important step). AI writes chapters one at a time using only the relevant character data and chapter spec. You can upload writing samples so it matches your voice. Then generate a cover, add illustrations, convert to audiobook, export as PDF/EPUB/DOCX.

Some technical details: we treat it as a compiler pipeline. Book metadata → character graph → chapter outlines → chapter content. Each step uses schema constrained structured output. Two model strategy: Gemini Flash for structural work (fast, cheap), frontier model for chapter prose (quality matters). Voice calibration uses writing samples as few shot examples plus extracted style features. Fiction and nonfiction have separate architectures. Fiction uses character graphs + plot continuity, nonfiction uses reference material extraction with citation tracking.

After 50K+ books: chapter sweet spot is 2,000 to 3,500 words. Outline detail sweet spot is 150 to 300 words per chapter. Romance and thriller generate well, literary fiction and humor are hard. Practical limit around 15 to 20 characters per book.

Stack: Next.js + Supabase. 30+ languages.

Happy to answer questions about the architecture, publishing space, or anything else.

Similar Projects

Developer Tools●●Solid

Asked AI to write for fun. It built a CMS to blog on

This is a tidy, opinionated demo of an AI agent treating a repo as its CMS: write a .md, git commit, Vercel auto-deploy — no admin UI or DB in sight. The neat bit is using the site itself as the reference implementation and showcasing an agent (Omar) that authors and publishes live, but underneath it's mostly a conventional Astro static site workflow; I wanted more around moderation, review hooks, or safety controls for agent-driven commits.

Niche GemShip It
ewimsatt
103mo ago