The Gospel of the Flying Spaghetti Monster is one of the funniest things I have come across in a while. Bobby Henderson, a physics grad student, has ingeniously crafted a mock religion that effectively parodies the fundamentalist aspects of western religions (especially Christianity) that mainstream Christians and non-Christians find groan-worthy.
Henderson created the Church of the Flying Spaghetti Monster, also known as Pastafarianism, in response to the recent trials over Intelligent Design and whether or not it belongs in a school's curriculum (or whether evolution has no place there). FSM claims that the world was created by a Flying Spaghetti Monster, that pirates are His chosen people, and that Earthly problems, such as global warming are a direct result of the shrinking numbers of (actual) pirates in the world (Henderson has a graph that shows there is a direct correlation between the number of pirates and average global temperatures).
Using "facts" and "science", Henderson shows how evolution is wrong and that life can only have been created by the FSM, who obviously has a sense of humor due to certain things that happen in life. He also talks about how FSM heaven is so much better than Christian heaven due to the presence of a beer volcano and a stripper factory.
Other great aspects are the twists on biblical stories and places (such as why the great flood occurred or the Olive Garden of Eden) as well as the 8 Commandments (or is it Condiments) or FSM, commonly known as the "8 I'd Really Rather You Didn'ts", due to the fact that each one starts off with, "I'd really rather you didn't...".
Obviously, this book requires a sense of humor to be enjoyed, because it pokes fun at religion. But if you can see this book for what it is, a great parody of some of the stranger aspects of religion, you will definitely enjoy it.