A BOOK THAT MADE YOU LAUGH OUT LOUD
I had a tough time choosing between Tom Holt, Terry Pratchett, Robert Rankin, and Douglas Adams, All four of these authors have caused me to giggle uncontrollably on trains and planes, in doctors' waiting rooms, and hotel reception areas; leading to me getting some very funny looks from total strangers.
In in the end I picked Tom Holt.
Expecting Someone Taller takes Wagner's Ring Cycle, removes all the boring singing bits, and transplants it to the English countryside. (A great improvement if you ask me.)
Poor old Malcolm Fisher runs over a badger who turns out to be the giant Ingolf (in disguise to escape from some rather angry Norse gods), and becomes the new owner of the Ring and the Tarnhelm. Much to his surprise, he is now the ruler of the Universe, and if that wasn't hard enough to deal with, he also has to try and stop a very annoyed Wotan and the Valkyries from taking the Ring off him.
Opera has never been so much fun.