“Five Critical Elements for Successful Indie Book Cover Design” by Jeffrey Abelson is a publishing guide on procuring the best cover possible for your indie book.
“Publishing Guide: Design a Book Cover That Sells in 2022” by Xavier Comas is a guide for how to brainstorm and execute cover design that sells in the modern era. Check out what tips Comas has on brainstorming, photography, collage, and more.