Mary Roach is an extremely funny writer, especially when she takes on semi-taboo subject. For me, the apotheosis of her oeuvre came with the mylar pants. Stiff is pretty typical of her work. That is, it's a terrific read, informative, thought-provoking, and not for the squeamish.
Don't read this book during a meal. Also, if you want to discuss it with your non-weird friends, be prepared to find people edging away from you. Seriously, though, this is good stuff. Even if you find the subject off-putting, Stiff is worth a read.