Interesting interview with book cover designer Peter Mendelsund at Design:related. Excerpt:

How often do you end up with a finished product that you don’t want your name attached to?

PM: Almost every day. One of the things that I find most people misunderstand about cover design on “the outside” is that so much of what happens is determined editorially, or in a marketing meeting. You try your best, but at the end of the day, most things are not going to turn out the way you liked. That’s why it behooves one to do a high volume of work. The law of averages suggests that you’ll end up with something to be proud of amongst the dreck at the end of the day.