Okay, now here's one:
This covers tells you a few things immediately. 1.) It's going to scare you. 2.) Holy crap where is that little boat going and why? 3.) The clown is going to get somebody at sometime in this book.
So this cover did it's job right? Might not be your cup of tea (oops, apple juice), but you have to admit it's effective.
Now just for kicks and giggles, lets look at one of my favorites:
I love this one because of it's simplicity. The title and the simple image made an impact. All time favorite and I don't even like pink.
What's one of your favorite book covers? Would love to know your thoughts on covers.