Every year the UK's Bookseller magazine runs the Diagram Prize for Oddest Book Title. This year's nominees are indeed quite odd, but I have to say that the covers are pretty disappointing. There's nothing here even as remotely peculiar as the titles would suggest.
I was amused, though, that in searching for that last cover, Google Images decided this picture was a good match:
My own suggestion for the prize, with a somewhat more imaginative cover than any of the above?