Understanding Book Trim Sizes: Which One Should You Choose?
Last reviewed by Robert Prime — March 2026 Book trim sizes are one of those dull technical details that most authors either ignore or screw …
KDP Formatting
Categories archive — 159 articles
What File Format Does KDP Accept? Complete Guide
Last reviewed by Robert Prime — March 2026 UK note: UK-specific considerations apply — ISBN purchases go through Nielsen (not Bowker), VAT …
KDP Print Paper Types: White vs Cream vs Premium Colour (2026 UK Guide)
Last reviewed by Robert Prime — April 2026 When you upload a paperback to KDP, you pick a paper type. A lot of authors I work with pick one …