There Once Was a Serpent

This original book is an informal outline history of theology, with key stages wittily captured in a series of limericks. For instance, Pascal's famous wager is captured as follows:

If God should exist, and you choose to believe it, you've paid him you dues. But if you're in doubt you might get left out. So try it -- you've nothing to lose!

The combination of explanatory text and limericks makes the book very readable.