You need to know these tenets if you’re working on a book cover. It never occurred to me that some writers are apparently putting bios on their back covers. I always thought that that was where a blurb and maybe a couple good review quotes went. Anyway, check these out. Great idea about subtitles, btw! Link: http://sharingwithwriters.blogspot.com/2013/02/what-every-author-should-know-about.html
From Carolyn Howard-Johnson’s Sharing with Writers e-newsletter and blog.