Loading…
The blogKDP rules6 posts
Trim sizes, spine width, cover specs, paperback or hardcover, and uploading to KDP.
KDP rules
The format question is arithmetic, not ideology. This 2026 guide runs the print-cost math, the royalty math, the spine width formulas, and a 5-book case study so you can pick paperback, hardcover, or both with the actual numbers in front of you.
17 min read
KDP rules
Most KDP cover uploads fail for the same six reasons. This 2026 click-by-click guide walks every screen of the Bookshelf, every spec, the Previewer trick that catches problems before review, and the exact fix for each rejection email.
14 min read
KDP rules
Every KDP cover specification that matters, in one runnable checklist. Bleed, safe zone, spine formula, DPI, CMYK profile, PDF/X-1a, file size, font embedding, barcode zone, and the 15-step pre-flight that catches problems before upload.
17 min read
KDP rules
Hardcover and paperback covers have different technical requirements. This complete guide ensures your designs work perfectly for both formats.
9 min read
KDP rules
Choosing the right trim size is crucial for your book’s success. Discover which of the 16 KDP paperback sizes works best for your genre.
10 min read
KDP rules
Spine width can make or break your KDP cover upload. Learn exactly how to calculate it based on your book specifications using the official KDP spine width formula.
12 min read
Cover design, book creation, and the business of publishing. Make your next move with a little more confidence.
Niches, pricing, age groups
8 posts
Read Coloring books postsDesign, AI art, fixes
14 posts
Read Covers postsTypes, formatting, themes
13 posts
Read Puzzle books postsKids books, genres, journals
21 posts
Read Book ideas postsTrim, spine, uploads
6 posts
Read KDP rules postsAds, keywords, launch
15 posts
Read Marketing postsBring your book to life with a cover that feels like you.
10 free credits make 2 cover previews with a mark. Download one without the mark: $7.50.
Make your cover in about 2 minutes.
10 free credits make 2 cover previews with a mark.
