Fastest way to write a book with AIFast way to write a BOOKAI book writing software 2026SidekickWriter vs Sudowrite

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

Discover the fastest way to write a book with AI in 2026. Compare SidekickWriter, Sudowrite, and ChatGPT to finish your novel or non-fiction draft in record time.

8 min read

Fastest Way to Write a Book with AI in 2026: Complete Comparison Guide

In 2026, the question isn't whether you should use AI to write a book, but which tool gets you to the finish line the fastest without sacrificing quality. The landscape has shifted from simple chatbots to sophisticated "co-pilots" that understand character arcs, plot continuity, and even academic citations. If you've been searching for the fastest way to write a book with AI or a fast way to write a BOOK that actually reads like a human wrote it, you're in the right place.

The bottleneck for most writers isn't the writing itself—it's the planning, the research, and the dreaded "middle of the book" slump. Modern AI writing platforms like SidekickWriter have solved this by creating structured workflows that can take a book from a single sentence to a 50,000-word manuscript in as little as 60 to 120 minutes.

In this guide you will learn

  1. The "7-Step Workflow" that eliminates writer's block forever.
  2. How to maintain your unique "Writing Voice" using AI.
  3. A detailed comparison of the top AI book generators in 2026.
  4. Why "SidekickWriter" is currently the fastest option for both fiction and non-fiction.
  5. Frequently asked questions about AI-assisted publishing.

1. The Core Difference: Specialized vs. General AI

To find the fastest way to write a book with AI, you must distinguish between general-purpose tools like ChatGPT and specialized book-writing platforms.

General AI (ChatGPT/Claude) Philosophy

These tools are "one-size-fits-all." They are incredible for brainstorming or writing a single scene, but they lack the "memory" or structure required for a full-length book. You have to manually feed them your character details, plot points, and previous chapters every time you want to write something new. This adds hours of "prompt engineering" to your workflow.

Specialized Book Generators (SidekickWriter/Sudowrite) Philosophy

Specialized tools are built with a "Book-First" architecture. They include built-in Character Bibles, World Building modules, and Sequential Generation. They remember what happened in Chapter 1 when they are writing Chapter 10. This is the secret to finishing a book in hours rather than months.

2. Feature Comparison: The 2026 Leaderboard

When speed is your priority, you need a feature set that handles the "boring" parts of writing (formatting, research, and consistency checks) so you can focus on the creative decisions.

FeatureSidekickWriterSudowriteChatGPT (GPT-4o)Inkfluence AI
7-Step Structured Workflow✅ Yes⚠️ Partial❌ No✅ Yes
My Writing Voice (Voice Matching)✅ Yes✅ Yes⚠️ Manual⚠️ Limited
Character Bible (Continuity)✅ Yes✅ Yes❌ No✅ Yes
Team Collab (Public Share Links)✅ Yes❌ No⚠️ Partial❌ No
Real Research with Citations✅ Yes❌ No⚠️ Hallucinates❌ No
Sequel Creation (Series Memory)✅ Yes⚠️ Limited❌ No❌ No
21+ Free Tools (No Signup)✅ Yes❌ No❌ No⚠️ Limited
Professional Export (EPUB/DOCX)✅ Yes✅ Yes❌ No✅ Yes

3. What SidekickWriter Is Best At

SidekickWriter shines when you want a complete, ready-to-publish book in a single afternoon. It is the only tool that effectively bridges the gap between creative fiction and rigorous non-fiction.

  • Unmatched Speed: The 7-step guided workflow takes you from "Main Idea" to "Full Book Generation" in a linear path.
  • Academic Rigor: For non-fiction authors, the AI Research Engine fetches real web and academic data, providing proper APA/MLA citations—something Sudowrite and ChatGPT simply cannot do.
  • Voice Consistency: Use the "My Writing Voice" feature to feed the AI a sample of your previous work. It will analyze your cadence, vocabulary, and tone to ensure the generated book sounds like you.
  • The "Penny" Assistant: A context-aware sidekick that lives in your dashboard and knows everything about your story.

4. What Sudowrite Is Best At

Sudowrite remains a powerhouse for "pantser" fiction writers—those who like to write by the seat of their pants and discover the story as they go.

  • The "Describe" Tool: If you're stuck on a scene, Sudowrite can expand it using the five senses, making the prose feel rich and immersive.
  • Story Engine: Like SidekickWriter, it has a drafting engine, though it is more focused on creative "pulp" and genre fiction (Romance, Fantasy, Thriller).
  • Canvas: A visual way to map out your story, which is great for visual thinkers.

5. The Fastest Way to Write a Book with AI: The 7-Step Workflow

If you want to use the fast way to write a BOOK, follow this proven 7-step framework used by pro authors on SidekickWriter:

Step 1: The Core Concept

Start with a one-sentence hook. If you don't have one, use the "Random Idea" generator. This sets the "North Star" for the AI.

Step 2: Define the Voice

Select your genre and writing style. Whether it's "Hard-boiled Noir" or "Professional Business Prose," setting this early prevents the AI from sounding generic.

Step 3: Build the Bible

Generate your character list. The AI suggests names, motivations, and traits. This "Bible" ensures your protagonist doesn't change eye color in Chapter 5.

Step 4: The Intelligent Outline

Generate a chapter-by-chapter outline. Review and tweak it. This is the skeleton of your book.

Step 5: Chapter Descriptions

SidekickWriter's AI suggests a summary for what happens in each chapter. This provides the "guardrails" for the generation phase.

Step 6: Multi-Pass Generation

Watch the text stream in real-time. SidekickWriter generates content in two passes—first for plot/facts, second for voice/style.

Step 7: Export and Share

Once finished, export directly to EPUB (for Amazon KDP) or DOCX (for your editor). You can also generate a public share link to get immediate feedback from beta readers.

6. Which One Should You Choose?

Choose Sudowrite if:

  1. You are writing strictly genre fiction (Romance/Fantasy).
  2. You prefer a "word-by-word" interactive writing experience.
  3. You don't need real-world research or citations.

Choose ChatGPT (GPT-4o) if:

  1. You are a hobbyist just experimenting with AI.
  2. You have the time to manually manage your story's context.
  3. You only need to write short stories or single scenes.

Choose SidekickWriter if:

  1. You want the fastest way to write a book with AI (1-2 hours).
  2. You need a structured, 7-step workflow that guarantees completion.
  3. You are writing non-fiction or academic work that requires citations.
  4. You want a suite of 21+ free tools to help with marketing and blurbs.

7. A Note on Academic Integrity

AI writing tools like SidekickWriter are designed to assist your process, not replace your brain. Especially in academic or business settings, use the AI to structure your research and overcome the blank page. Always review the output to ensure it matches your standards.

Conclusion

The "fast way to write a book" used to mean cutting corners. In 2026, it means using the right technology to handle the heavy lifting. SidekickWriter stands out as the most comprehensive, end-to-end solution for authors who are serious about finishing their manuscripts.

Ready to finish your book? Start writing for free at sidekickwriter.com

Frequently Asked Questions

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

The fastest way is using a dedicated book-writing platform like SidekickWriter. By following a structured 7-step workflow (Idea → Voice → Bible → Outline → Chapters → Generation → Export), you can complete a full-length manuscript in under 2 hours.

Can AI write a whole book?

Yes, modern AI can generate a full book, but the best results come from a "co-pilot" approach. Tools like SidekickWriter allow you to guide the AI at every step, ensuring the plot and characters remain consistent throughout the entire manuscript.

Which tool is best for non-fiction with citations?

SidekickWriter is the industry leader for AI non-fiction. It features a built-in Research Engine that searches the web and academic databases, automatically generating citations in APA, MLA, and Chicago styles.

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

Yes. SidekickWriter offers a generous free tier and a suite of 21+ free tools (including outline and title generators) that you can use without even signing up.

Does SidekickWriter support sequel creation?

Yes. Because SidekickWriter maintains a "Character Bible" and "World Bible" at the project level, it can maintain continuity across multiple books in a series, making it the fastest way to build a literary universe.

Target Keyword: Fastest way to write a book with AI Estimated Read Time: 6 min Word Count: ~1100 words Character Count: ~7200