Here are some interesting insights  from one of the more successful Book cover designers of our time, interesting and funny, despite his lopsided glasses.

From Youtube:

Chip Kidd doesn’t judge books by their cover, he creates covers that embody the book — and he does it with a wicked sense of humor. In one of the funniest talks from TED2012, he shows the art and deep thought of his cover designs. (From The Design Studio session at TED2012, guest curated by Chee Pearlman and David Rockwell.)