Based on my research and personal use, here are the top AI tools for writing books. I’ve listed their best features, what they’re good at, what kind of AI they use, and how much they cost.
1.Sudowrite
Sudowrite is a AI writing tool designed write as a fiction authors.Creative storytelling, craft scenes for writer, buildcompelling characters, and push through writer’s block. Sudowrite AI tool is unique as it has unique suite of features—such as the Story Bible, plot twist generator,and scene expansion tools—all tailored specifically for novel writing.
Key feature
1)Keep your characters, settings, and world-building elements organized.
Sudowrite remembers these details and uses them to ensure consistency throughout your story.
2)Stuck on a plot point or character arc? Instantly spark new ideas for twists, backstories, or
scenes with this creative prompt generator.
3) Need a vivid setting or snappy dialogue? Sudowrite offers detailed descriptions and realistic
dialogue suggestions to bring your scenes to life.
4)Use the Chapter Generator to turn a brief summary into a full draft, or the Expand tool to transform short passages into rich, detailed scenes.
5)Easily rework any section of your writing by shifting the tone, refining style, or rewriting
for better flow or emotion.
Pricing
Sudowrite operates on a subscription-based pricing model that combines monthly plans with a credit system. Pricing starts at $19/month, giving you up to 225,000 AI-generated words, and goes up to $129/month for 2 million words with credit rollover.
The most popular plan is $29/month, which provides around 1 million words—more than enough to draft several novels. Word generation is credit-based, with larger language models usingmore credits per word and smaller ones using fewer. While there’s no unlimited plan, the word
allowances are generous (for example, 1 million words can cover up to four full book drafts). New users can get started with a free trial offering 10,000 words
2. NovelAI
NovelAI is an AI writing tool built for fiction authors, fantasy creators, and interactive storytellers. It’s especially popular among writers of sci-fi, anime, and fan-fiction. Unlike structured drafting tools, NovelAI provides a more freeform, imaginative writing experience, allowing users to co-create stories with AI that continues their narrative in real time.
This tool is all about creative freedom, offering multiple storytelling models, deep customization, and a private space to explore your imagination. Whether you’re building a fantasy universe or writing immersive character dialogue, NovelAI gives you the tools to bring your ideas to life.
🔑 Key Features:
1)Interactive Story Continuation
Write a sentence or paragraph, and NovelAI continues the story naturally—like a co-author that predicts your next move. You can accept, edit, or retry AI outputs as you shape your narrative.
2)Lorebook & Memory System
Track important details like character traits, backstories, and world-building elements using the Lorebook. Pin facts to the AI’s memory so it remembers them throughout your story, helping with consistency across chapters.
3)Multiple AI Models
Choose from various storytelling models like Euterpe, Sigurd, Kayra, and more—each with different writing styles. Higher-tier models offer more coherent, poetic, or descriptive outputs depending on your needs.
4)Adjustable Generation Settings
Customize the AI’s creativity, output length, and narrative style. Advanced users can tweak temperature, repetition penalties, and even use tokens to fine-tune output tone and structure.
5)Style Modules & Themes
Apply pre-set writing styles such as “Haunted House” or “Epic Fantasy” to guide the tone. The writing interface can also be customized with cozy, anime-style or minimal writing themes to match your creative vibe.
6)Anime-Style Image Generation
NovelAI includes a powerful image generator trained on anime art, allowing users to generate character portraits, scenes, or book illustrations directly from text prompts.
💰 Pricing:
Tablet – $10/month
Unlimited text generation with standard models like Kayra (13B), up to ~4,000 tokens memory. Ideal for casual writers.
Scroll – $15/month
Unlimited text + double memory (8,000 tokens), ideal for longer context continuity. Includes bonus “Anlas” (credits) for image generation.
Opus – $25/month
Access to the largest models (70B parameters) for higher-quality storytelling, extended memory, priority image generation, and all premium features.
Free Trial:
Test the platform with 100 free generations and limited memory. While there’s no forever-free plan, the trial lets you explore the interface and story continuation experience.
🔎 NovelAI is perfect for writers who prefer creative freedom over structured templates. It’s not ideal for nonfiction or SEO-based writing but shines in fantasy, roleplay, and serial fiction writing.
3. Claude Pro
Claude Pro is an advanced AI writing tool made by Anthropic. It’s great for writers working on long stories, novels, or nonfiction books. Claude helps you write full chapters, keep your plot consistent, and improve your story.
It can remember large amounts of text (up to 200,000 tokens), so you can upload your notes, outlines, and chapters, and Claude will understand and use them while writing. It works like a smart editor that gives thoughtful, creative help to improve your writing.
Key Features :
1)Handles Long Content: Can read and work with full books or big outlines (up to 200K tokens).
2)Natural Writing Style: Gives human-like, emotional, and well-written responses.
3)Multiple File Support: Reads and remembers details from many files like notes, chapters, etc.
4)Smart Editing: Helps fix tone, structure, and gives useful writing feedback.
5)Creative Help: Suggests new plot ideas, endings, or dialogue when you’re stuck.
6)Safe and Aligned: Built to follow your instructions and avoid harmful or off-topic content.
Pricing
Claude Pro costs $20/month and gives access to Claude 3 Opus, the most advanced version. There’s no credit system—you can use it based on message size and how often you use it, with generous daily limits.
A free version is also available with Claude 3 Sonnet, which has limited daily use—great for trying it before upgrading.
4.Jasper
Jasper AI is a smart writing tool for professionals, marketers, and business authors. It’s great for writing nonfiction books, brand-based stories, and eBooks. Jasper helps you keep your brand voice consistent and offers tools for teamwork, content templates, and SEO optimization. It also works well with Surfer SEO, making it ideal for authors writing for online readers.
Key Features:
1)50+ Templates: Ready-made formats for book chapters, ads, blogs, and more—great for nonfiction.
2)Brand Voice Memory: Train Jasper to match your writing style for consistent tone.
3)Jasper Chat: Chat-style AI helps you brainstorm, outline, and write in real time.
4)Long-Form Editor: Write and edit full chapters or blog posts easily in one place.
5)SEO Integration: Built-in Surfer SEO helps optimize content with real-time keyword and readability tools.
6)Team Collaboration: Add co-authors or editors to work together smoothly.
Pricing
Jasper AI offers three main pricing tiers, based on features and access level:
Creator Plan – $49/month
For individual authors and freelancers. Includes brand voice memory, chat, and document writing with GPT-4 access.
Pro Plan – $69/month
Adds collaboration features, more brand voice slots, and greater memory limits. Ideal for co-authors or content teams.
Business Plan – Custom Pricing
Tailored for large teams or publishing firms. Includes API access, multiple brand voices, dedicated support, and usage analytics.
Jasper doesn’t operate on a word-credit system—instead, you get unlimited words on all paid plans (subject to fair use), with access to both GPT-3.5 and GPT-4 depending on your tier.
*New users can try Jasper free for 7 days.
5. Copy.ai
Copy.ai is an AI writing tool built to streamline content creation, marketing copywriting, and business communication. While it’s primarily geared toward marketers and sales teams, Copy.ai also serves as a powerful assistant for nonfiction authors, especially those writing books on entrepreneurship, personal branding, marketing, or thought leadership.
What makes Copy.ai unique is its workflow automation and marketing-focused templates—helping you not just write a book, but also plan and promote it effectively across platforms like Amazon, LinkedIn, and newsletters.
Key Features
1)AI Workflows
Automate multi-step writing tasks (e.g. “Create a book outline → Chapter draft → Social media post”) in a single click. Ideal for authors looking to batch content or repurpose book chapters into marketing assets.
2)100+ Writing Tools
Generate content like chapter outlines, summaries, blurbs, ad copy, emails, landing pages, and more using a library of specialized templates.
3)Brand Voice Control
Train the AI to mimic your unique tone, so everything from your book draft to your newsletter sounds consistently “you.”
4)Project Organization & Templates
Organize your writing by projects, keep track of different drafts, and use templates built specifically for book blurbs, titles, and summaries.
5)Multilingual Support
Write and translate content into over 25 languages—useful for authors targeting global audiences or publishing multilingual editions.
6)Team Collaboration
Add team members, share drafts, and coordinate writing and editing with copywriters or co-authors.
Pricing
Copy.ai has simplified pricing that includes unlimited words across plans:
Free Plan: Access to basic tools with limited features and GPT-3.5 generation
Pro Plan – $49/month: Includes unlimited projects, access to GPT-4, brand voice tools, and workflow automation
Team & Enterprise Plans – Custom Pricing: For multiple users, large-scale content generation, API access, and advanced automation
All plans (except the free tier) allow access to GPT-4 and priority generation, making it a competitive choice for high-quality long-form content.
Best For: Copy.ai is ideal for nonfiction authors, especially those building a brand or business around their book. It’s great for writing the book and creating all the supporting material—from product descriptions and landing pages to social media content and email sequences.
For authors who want a book that markets itself, Copy.ai is a powerful, automation-friendly solution.
6.Youbooks
Youbooks is an AI-powered book-writing tool specifically designed for nonfiction authors, course creators, and entrepreneurs looking to create publish-ready books quickly. Unlike general AI content tools, Youbooks focuses entirely on the book-writing process—guiding users from outline to final manuscript using AI models like GPT-4, Claude, Gemini, and others.
What sets Youbooks apart is its step-by-step workflow, which walks you through ideation, structuring, drafting, and exporting your book—all in one place. It’s ideal for authors who want to create self-help guides, business books, how-to manuals, or lead magnets without worrying about formatting or structure.
Key Features
1)Outline-to-Book Workflow
Start with a topic or book idea, and Youbooks automatically builds an outline and expands each section into chapters—perfect for nonfiction authors who need structure and speed.
2)Multi-AI Integration
Youbooks uses a combination of AI models (GPT-4, Claude, Gemini, LLaMA) to ensure accuracy, creativity, and style flexibility in content generation.
3)Export-Ready Manuscripts
Once the book is generated, you can export your full draft in clean, editable formats like PDF, DOCX, or ePub—ready for publishing or editing.
4)Research Support & Content Accuracy
Especially useful for nonfiction, Youbooks emphasizes factually correct content, pulling from multiple models to validate and support claims or ideas.
5)User-Friendly Interface
No tech skills required—ideal for first-time authors or business owners looking to self-publish quickly without hiring a ghostwriter.
6)Lifetime Access Deal
Youbooks offers a one-time payment model, which is a rare and valuable option compared to monthly subscriptions from most AI tools.
Pricing
Youbooks follows a one-time purchase pricing model:
Lifetime Plan – $49 (Limited Deal):
Full access to all features, unlimited book generation, multi-model support, and exporting tools—no monthly fees.
This lifetime deal makes Youbooks one of the most affordable long-term AI writing tools, especially for authors looking to publish multiple nonfiction titles.
Best For: Youbooks is ideal for nonfiction writers, coaches, course creators, and entrepreneurs who want to turn their knowledge into books without dealing with writer’s block or complex formatting. If you’re looking for a fast, affordable way to get a book
written and ready for publishing, Youbooks is one of the simplest and most effective tools available.
7.Squibler.ai
Squibler is an AI writing platform built for authors, screenwriters, and storytellers.
It combines structured book planning with creative AI support to help you draft, organize, and finish your book faster. Unlike many AI tools that just generate paragraphs, Squibler gives you a Scrivener-style workspace designed to guide your full writing journey—from outline to final manuscript. It’s ideal for fiction and nonfiction writers, including those working on novels, screenplays, memoirs, or self-help books.
Key Features
1)Book Project Templates
Choose from ready-made templates for novels, memoirs, screenplays, and more. Each comes with pre-filled chapters and prompts to guide your writing.
2)Scene & Chapter Management
Write your story by scenes or chapters with a drag-and-drop editor that makes reorganizing your book easy and intuitive.
3)Daily Goals & Productivity Tools
Set custom writing goals and deadlines, and track your progress inside Squibler’s distraction-free writing dashboard.
4)AI-Powered Co-Writer
Use Squibler’s built-in AI to brainstorm plot twists, expand on scenes, and improve emotional depth with smart rewrite suggestions like “show, don’t tell.”
5)Version History & Revisions
Squibler automatically saves every version of your work so you can restore earlier drafts or undo changes without worry.
Pricing
Squibler follows a flat monthly pricing model:
Pro Plan – $16/month
Includes unlimited writing projects, AI features, book templates, revision history, and collaboration tools.
Free Trial – 14 Days
Try all premium features for free without commitment. There are no word or usage limits, making it ideal for serious writers who write often.
Best For: Squibler is perfect for fiction writers, nonfiction authors, and scriptwriters who want a blend of structure, creative help, and professional project management. If you’re looking for an all-in-one workspace to plan, write, revise, and publish, Squibler is one of the best AI book-writing platforms available.