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Guides

Quick answers to the print questions that trip up self-published authors.

IngramSpark spine width: the real numbersMeasured IngramSpark spines for White 50 and Creme, and why the KDP formula is 5–15% off.Why was my KDP cover rejected?The 10 most common reasons KDP rejects a paperback cover, and how to fix each one.KDP paperback vs hardcover cover sizeWhy a hardcover cover is bigger, what wrap and hinge mean, and side-by-side sizes.KDP vs Lulu spine widthWhy the same book needs a different cover on each platform, with a comparison table.