10 Common Mistakes When Self-Publishing Your First Book

The most common mistakes when self-publishing a book, especially a first book on Amazon KDP, fall into three groups. The first is content: publishing AI-generated drafts without rewriting them, trying to copyright AI-written text, and skipping a professional editor. The second is money: overpaying for premium packages, or trusting cheap vanity companies with no track record. The third is files and listing: designing only the front cover, uploading an unformatted Word document, using the wrong page size, forcing a series into one oversized book, and publishing in broad, crowded categories. Most of these surface only after the book is live, when fixing them costs more than avoiding them would have.

The patterns below come from first books that authors bring to Writers of the West for revision, republishing or rescue, together with the KDP rules that cause the problems.

Quick Checklist Before Self-Publishing Your First Book

1. The manuscript reads in your voice, with no repeated passages or leftover AI responses
2. Any AI-generated content is disclosed to KDP and excluded from copyright claims
3. A professional editor has reviewed it
4. You’ve compared what’s included in each publishing package, not just the price
5. The company has a verifiable track record: real books, real reviews, a real address
6. The paperback cover is a full wrap: back, spine and front in one PDF
7. The ebook uses heading styles and a working table of contents
8. The interior is set to a standard trim size, such as 6″ x 9″, not Word’s default page
9. The book is a readable length, or split into a series
10. KDP categories, keywords and the description are based on real search data

1. Publishing an AI-Generated Draft Without Rewriting It

The most common self-publishing mistake we see in 2026 is a first book generated with AI, formatted and published, and only later found not to sound like its author. The giveaways are consistent: the same phrases and sentence rhythms repeated across chapters, ideas restated in slightly different words, and, more often than you’d expect, leftover chatbot responses such as “Certainly! Here’s a revised version of your chapter” left in the published text.

KDP also has disclosure rules. It requires authors to disclose AI-generated text, images and translations, and heavy editing afterward doesn’t change that classification. Our guide to the Amazon KDP AI content policy explains the difference between AI-generated and AI-assisted content.

Fix: If AI produced the draft, treat it as raw material. Rewrite it in your own voice, search the manuscript for repeated passages and leftover prompts, and have an editor review it before formatting.

2. Trying to Copyright AI-Generated Text

First-time authors often assume they own everything in their book. Under U.S. law, purely AI-generated material can’t be copyrighted. The U.S. Copyright Office’s March 2023 guidance states that copyright “can protect only material that is the product of human creativity,” and that applicants must disclose AI-generated content and exclude it from their claim.

Fix: You can register your own human-written contributions. Disclose AI-generated portions accurately when you register. The more of the book you’ve actually written yourself, the more of it you can protect.

3. Skipping a Professional Editor

Skipping editing is usually a money-saving decision, and it’s the one readers notice first. It matters most for a first book and for any manuscript that started with AI, where repetition and inconsistency are hardest for the writer to see.

Fix: Budget for at least one round of professional editing services: developmental editing for structure, line editing for voice and clarity, and proofreading before publication. If you’re only paying for one service, make it this one.

4. Paying Premium Prices Without Comparing What’s Included

A higher price doesn’t guarantee a better service. Hybrid publishers such as She Writes Press charge a $12,000 package fee and also take a share of sales. Many expensive self-publishing companies charge similar amounts for services that a lower-priced package, or the author on their own, could cover. Our comparison of the best hybrid publishing companies shows how costs and royalty splits differ.

Fix: Compare packages line by line: editing rounds, formats, distribution channels, marketing and royalties. A $2,000 package and a $12,000 package can include much of the same work. Ask what the extra cost actually pays for, and check published package prices before accepting a custom quote.

5. Choosing a Cheap Vanity Publisher With No Track Record

At the other extreme, first-time authors get pulled in by very cheap offers from companies they can’t verify. Writer Beware documented a network of 28 near-identical websites run from overseas. They used the same templates and word-for-word content, recruited authors through social media ads and Google sponsored links, and then either disappeared or kept demanding more fees. The Authors Guild keeps a list of publishing scam alerts.

Fix: Before you pay, ask for live links to books the company has published, look for independent reviews (BBB, Trustpilot, Google), check that it has a real business address, and be wary of templated websites and keyword-stuffed domains.

6. Designing Only the Front Cover

Many authors commission or create a front cover, then find at the KDP upload stage that a paperback needs much more. KDP requires a single PDF that includes the back cover, spine and front cover as one image. The spine width depends on the final page count and paper type, so the full cover can only be finished once the interior is formatted.

Fix: Finalize the interior first, calculate the spine width from the page count, and have the cover designed as a full wrap. Our book design services cover all three panels.

7. Uploading an Unformatted Word Document to KDP

Uploading a raw Word document often produces an ebook with broken chapter breaks, inconsistent spacing and a table of contents that doesn’t work. A common cause is typing the table of contents by hand. A typed list isn’t a working ebook TOC. KDP’s instructions build the TOC from Word heading styles, and its navigation guidelines say a logical table of contents is especially important for books longer than 20 pages.

Fix: Apply heading styles to every chapter title, generate the table of contents automatically, and preview the file in Kindle Previewer before publishing. Or use professional book formatting services for clean print and ebook files.

8. Formatting the Interior on the Wrong Page Size

Word opens new documents on a US Letter page (8.5″ x 11″), but most trade books are far smaller. According to KDP, the most common trim size for books in the U.S. is 6″ x 9″. A manuscript laid out on a letter-size page has to be reformatted for the real trim size, which changes the page count, the margins and the spine width.

Fix: Choose your trim size before formatting, and set the document to that size, with the correct margins, from the start.

9. Forcing a Series Into One Oversized Book

Some first-time authors pack several storylines, timelines or topics into one very long book when it would work better as a series. Beyond being harder to read and market, long books hit print limits. KDP paperbacks in common trim sizes such as 6″ x 9″ max out at 828 pages, and longer books cost more to print, which raises the minimum list price.

Fix: If the manuscript has natural breaking points, such as separate arcs, time periods or subjects, consider publishing it as a series. Each book becomes easier to read, cheaper to print, and gives readers a reason to buy the next one.

10. Choosing Broad, High-Competition KDP Categories and Keywords

First books are often published into broad categories with generic keywords and an unresearched description, so they get buried among thousands of competing titles. KDP lets authors choose 3 categories and up to seven keywords or short phrases. These are limited slots, and they work best when they’re based on what readers actually search for and which categories the book can realistically rank in.

Fix: Research competing titles, category competition and reader search terms before you fill in the listing, then write the description around the language readers use. Our self-publishing services and Amazon book publishing services both include category, keyword and description research. Our breakdown of how we position books to compete for #1 on Amazon shows the process with examples.

FAQs

What are the most common mistakes when self-publishing a book?
The most common mistakes are publishing unedited or AI-generated drafts, skipping professional editing, designing only the front cover, uploading an unformatted Word document, using the wrong trim size, and choosing broad, high-competition categories and keywords.

What are common mistakes when self-publishing a first book on KDP?
On KDP specifically, first-time authors often upload a front-only paperback cover instead of the full back-spine-front PDF, use a typed table of contents instead of one generated from heading styles, format on Word’s letter-size page instead of a standard trim such as 6″ x 9″, and leave KDP’s 3 categories and 7 keyword slots unresearched.

Can you copyright a book written by AI?
Not the AI-generated parts. The U.S. Copyright Office protects only human-authored material and requires applicants to disclose and exclude AI-generated content. Your own human-written contributions can still be registered.

Do you have to disclose AI-generated content on Amazon KDP?
Yes. KDP requires disclosure of AI-generated text, images and translations, even if they were edited heavily afterward. AI-assisted content, where you wrote the text and used AI only to edit or refine it, doesn’t need to be disclosed.

What size should my first self-published book be?
For most U.S. trade books, 6″ x 9″ is the most common trim size on KDP. Smaller sizes such as 5″ x 8″ are common for fiction. Set the size before you format the interior.

Why does my ebook table of contents not work on Kindle?
Usually because it was typed manually instead of generated from heading styles. Apply Heading 1 to each chapter title and generate the table of contents automatically, as KDP’s instructions describe.

How do I avoid self-publishing scams?
Ask for live links to books the company has published, check independent reviews and its business address, compare package inclusions, and check Writer Beware and the Authors Guild scam alerts before signing.