In one of my trivia books, I came across a list of past winners of the odd book title contest, which I'd not heard of until that moment. It immediately struck my fancy, as I like finding humor in places where one would not necessarily expect to find humor. It turns out, this contest was started in 1978 by The Bookseller (first winner of the Diagram Prize - Proceedings of the Second International Workshop on Nude Mice), where you can vote on which title you think is oddest of this year's bunch.
This year's list can be found here. I personally like "Are Women Human? And Other International Dialogues," but there are plenty of good ones out there.