HAHA! That happens to me a lot with comics as well. Oh man I know what you mean, you pace the aisles back and forth searching for something, anything else because you know what you hold in your hands is pure and utter crap. All the while muttering, "but this cover is so damn cool!" Very rarely though, the cover is spot on. A good example of that is "The Dragon and The George," one of the best fantasy books I've read.