Okay, everybody raise your hand if you're Alan Moore.
But seriously, the "Now a Major Motion Picture" tag on books, especially if the cover has been movie-fied, is a huge pet peeve of mine. I actually preferred to hunt down a used copy of I, Robot from some hole in the wall bookstore rather than put Will Smith's face on my bookshelf. It's not that it's necessarily insulting to the source material, especially if the movie was a pretty good adaptation, it's just that the book and the movie are two separate things. Watchmen the book does not star Jackie Earl Haley. Fight Club the book does not star Edward Norton. Also movie posters make ugly book covers, IMO.