This one is also great - mostly because it was written right before the collapse, and it nails everything (at least as far as causes go - his solutions are debatable). Very smart book.

http://www.amazon.com/The-Trillion-Dollar-Meltdown-Rollers/d...

Edit: also, this version, updated in early 2009:

http://www.amazon.com/The-Two-Trillion-Dollar-Meltdown/dp/15...