I've recently read (in the span of 24 hours) Last Chance to See by my favourite Douglas Adams. As usual when reading one of his books, there were points for astounding contemplation, and outright belly laughter.
Basically, Douglas and his zoologist friend Mark Carwardine travel to a series of places around the globe to track down and see some of the most endangered species on the planet. It's literally their last chance to see some of these creatures before their gone. The laughs come from the adventures along the way, and takes a few plugs at the bureaucracy retained by small former colonial nations.
Thanks to Richard for recomending that I read it.