10 Common eBook Formatting Mistakes That Kill Your Book Sales

Introduction

Publishing an eBook today is easier than ever—but getting it professionally formatted is where many authors go wrong. Even great content can fail if the formatting looks unpolished or inconsistent.

After working with thousands of books, one thing is clear: poor formatting directly impacts reader experience, reviews, and ultimately, sales.

Let’s look at the most common mistakes authors make—and how to avoid them.

1. Inconsistent Fonts and Styles

Using different fonts, sizes, or spacing across chapters makes your book look unprofessional.

👉 Fix: Stick to 1–2 fonts and maintain consistent styling throughout.

2. Incorrect Paragraph Spacing

Random gaps, no indentation, or uneven spacing can confuse readers.

👉 Fix: Use proper paragraph styles instead of manual spacing or line breaks.

3. Not Optimizing for Different Devices

Your eBook might look fine on a laptop but break on Kindle or mobile.

👉 Fix:  Fix: Always format using reflowable layouts (such as EPUB).

4. Improper Image Formatting

Images that are too large or misaligned increase file size and disrupt reading.

👉 Fix: Fix: Compress images and ensure proper alignment.

5. Broken Table of Contents (TOC)

A non-clickable or incorrect TOC frustrates readers instantly.

👉 Fix: Use a properly linked, navigation-friendly TOC.

6. Ignoring Kindle Guidelines

Many authors upload files that don’t meet publishing standards, leading to rejection.

👉 Fix: Follow platform-specific formatting rules carefully.

7. Manual Formatting Instead of Styles

Using manual bold, spacing, or alignment causes issues during conversion.

👉 Fix: Use structured styles (Heading 1, Heading 2, etc.).

8. Large File Size

Heavy files slow downloads and may even get rejected.

👉 Fix: Optimize images and clean unnecessary formatting.

9. No Page Break Consistency

Chapters starting randomly without proper breaks look messy and unprofessional.

👉 Fix: Insert consistent page breaks before every chapter.

10. Skipping Professional Review

Many authors publish without checking how the book looks on real devices.

👉 Fix: Always preview on Kindle, mobile, and tablet.

Final Thoughts

Formatting is not just about appearance—it’s about reader experience and credibility.

A well-formatted eBook:
✔ Keeps readers engaged
✔ Gets better reviews
✔ Increases sales potential

If you're serious about publishing success, investing in professional formatting can make a real difference.

👉 Many self-publishers trust AtoZEBook Conversion for accurate and efficient eBook conversion services.