John Hodgman, the PC actor in the ubiquitous Mac TV commercials, has written several books. The covers of these books are just plain ugly and can't possibly be doing much to sell the books. Nonetheless, they are selling well. Both are in the top 2,000 titles on Amazon. Apparently the content is funny because the covers are not.
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Do you like these covers? They fade away to blah, blah, blah in the video interviews I've seen. That means they disappear, are unreadable, don't snap at all.
Since the books are from two different publishers, my guess is that John had a lot of input into the cover designs (since they look so similarly ugly).