Fastest Way to Write a Book with AI in 2026: The Ultimate Speed Comparison

Fastest Way to Write a Book with AI in 2026: The Ultimate Speed Comparison

In 2026, the question isn’t if AI can help you write a book, but which tool is the fastest way to write a book with AI without sacrificing quality. Whether you are a fiction novelist, a non-fiction expert, or an academic researcher, the landscape of AI writing tools has evolved into a high-speed race to the finish line.

Writing a 50,000-word book used to take months or years. Today, with the right workflow and the right "sidekick," authors are completing comprehensive, structured drafts in as little as 1 to 2 hours. But not all tools are built for speed. Some excel at creative prose, while others specialize in marketing copy or academic rigor.

In this guide, we compare the top AI book writing platforms to help you find the absolute fastest path from blank page to published author.

In this guide you will learn

1. The 7-step workflow for maximum AI writing speed
2. How SidekickWriter compares to Sudowrite, Jasper, and NovelAI
3. The importance of character bibles and citations for long-form content
4. A feature-by-feature breakdown of the industry leaders
5. The secret to finishing a professional-grade book in under 2 hours

1. The Core Difference: Speed vs. Prose

The "Creative Slow-Burn" Approach (Sudowrite & NovelAI)

Tools like Sudowrite and NovelAI are built for the process of writing. They are phenomenal at helping you brainstorm the next sentence or describe a room in visceral detail. However, they often require significant manual intervention. You write a bit, the AI writes a bit. It’s faster than solo writing, but it still follows a linear, manual path.

The "Completion-Focused" Approach (SidekickWriter)

SidekickWriter is built for completion. The philosophy here is different: it focuses on the structure first. By generating a comprehensive idea, writing style, character bible, and chapter-by-chapter outline before a single word of the book is written, the AI can then "stream" the entire book into existence. This is why it is consistently cited as the fast way to write a book for those who want a finished product fast.

2. Feature Comparison: The 2026 AI Book Writing Matrix

3. What Each Tool Is Best At

SidekickWriter: Best for Speed and Research

SidekickWriter shines when you need to go from "zero to book" in one sitting. It is the only tool that integrates a real-time research engine that fetches web and academic sources, making it the #1 choice for non-fiction and academic authors who need facts, not just filler.

Sudowrite: Best for Fiction Stylings

Sudowrite is the darling of the fiction community for a reason. Its "Describe" and "Rewrite" features are industry-leading for improving the texture of your prose. Choose this if you have a lot of time and want to play with every single sentence.

Jasper: Best for Short Business Guides

Jasper is optimized for marketing. If you are writing a 10,000-word lead magnet or a business pamphlet, Jasper’s templates are excellent. However, it often struggles with the long-term context needed for a 50,000-word novel.

NovelAI: Best for Privacy and Fanfiction

NovelAI offers incredible freedom and privacy. It doesn’t have the same guardrails as other tools, making it popular for experimental or niche genre fiction.

4. Pricing Comparison (Monthly Plans)

5. The 7-Step Workflow for a 1-Hour Book

To achieve the fastest way to write a book with AI, follow this proven SidekickWriter workflow:

1. Generate the Core Idea: Use the AI to expand a simple concept into a multi-dimensional premise.
2. Define the Voice: Upload a sample of your writing or select a genre-specific style (Academic, Thriller, Business).
3. Build the Bible: Let the AI suggest characters and settings that maintain continuity throughout the book.
4. Draft the Outline: Generate a 20-30 chapter outline. Refine it until the pacing is perfect.
5. Research (Non-Fiction): Use the Deep Search tool to find and cite real-world sources automatically.
6. Stream the Content: Run the generation engine. Watch as the AI writes each chapter with awareness of the previous ones.
7. Export & Publish: Download your book as a professional DOCX or EPUB file, ready for Amazon KDP.

6. Frequently Asked Questions

What is the fastest way to write a book with AI?

The fastest way is to use a completion-focused tool like SidekickWriter. By automating the outline and character continuity first, you can generate a 50,000-word draft in approximately 1-2 hours, compared to weeks with general AI chatbots.

Can AI write a book with proper citations?

Yes. SidekickWriter includes a dedicated research engine that searches the live web and academic databases to provide real citations in APA, MLA, and Chicago styles, ensuring your non-fiction or academic book is factually grounded.

Is there a free way to write a book with AI?

Most professional tools offer trials, but SidekickWriter provides a permanent Free Tier and a suite of 21+ free writing tools (like a Chapter Outline Generator and Book Title Generator) that don’t even require an account.

Does the AI learn from my book?

At SidekickWriter, your privacy is a priority. Your manuscripts and ideas are your intellectual property and are not used to train global AI models.

Which tool is best for fiction vs non-fiction?

For fiction, Sudowrite and SidekickWriter are the top contenders. For non-fiction, business, and academic writing, SidekickWriter is the clear winner due to its research integration and structured workflow.

Conclusion

Writing a book no longer has to be a grueling, year-long process. By leveraging the fastest way to write a book with AI, you can focus on the big-picture storytelling and let the technology handle the heavy lifting of drafting and research.

If you want to finish your book today, there is no better starting point than SidekickWriter.

Try SidekickWriter for Free

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