Topical Hub

Amazon KDP Success Hub

The definitive technical resource for Amazon KDP self-publishing. From gutter math and PDF/X-1a standards to high-conversion cover architecture and professional interior layouts.

Amazon KDP (Kindle Direct Publishing) requires print books as PDF/X-1a files at 300 DPI with 0.125" bleed on all sides. Popular trim sizes are 6"×9" for non-fiction and 5.5"×8.5" for fiction. Spine width is calculated by multiplying page count by 0.002252 inches for standard black-and-white paper.

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KDP Interior Formatting

Precision typeset manuscripts that meet every KDP print specification for 2026. 100% approval guaranteed.

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Bestselling Cover Design

High-conversion architecture specifically optimized for the Amazon A9 algorithm and physical shelf presence.

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KDP Spine Calculator

Free tool to calculate exact spine width and cover dimensions for 2026 KDP specs.

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Technical Guidelines 2026

Deep dive into bleeds, margins, and the technical standards required for premium KDP results.

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Knowledge Vault.

Deep dives and expert guides for KDP Publishing.

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Kindle vs. Print Formatting: Why Your eBook and Paperback Need Different Layouts

Why your Kindle file cannot be a copy-paste of your print book. Learn the key formatting differences and how to create both versions correctly for 2026.

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Microsoft Word vs. InDesign: Can You Format a Bestseller in Word?

Microsoft Word vs InDesign for book formatting: compare features, costs, and output quality. Find the right tool for your self-publishing project.

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The Self-Publishing Timeline: When to Start Book Design and Formatting

When should you start book design and formatting? A realistic timeline from manuscript to launch that most authors get wrong. Plan ahead for 2026.

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How to Get Your Book Into Bookstores Using IngramSpark (2026)

Getting a self-published book into bookstores is realistic with IngramSpark expanded distribution. Here is what USA and UK retailers actually check before they order.

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How to Write an Amazon Book Description That Sells (2026)

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