I always thought Buddhism wasn't a religion anyway, more of a teaching instead, I've even read about a Buddhist following Catholic priest recently where he explained Buddhism as an addition to his Christian faith ( so they're not ruling each other out perse ).
Although I have to admit I'm not very knowledgeable about Buddhism or even religious for that matter ( like EvilNeal I'm more a man of science, although I hardly comprehend it

) I have heard of a book called "The Tibetan book of living and dying" which apparantly is a very hard read ( even to those owning a reasonable set of brains ) but maybe a follow up reading suggestion for you if you want to go deeper into the subject of Buddhism.