Book 21: Carpe Jugulum (Pratchett)

Funny and true.

Book 20: The Judging Eye (Bakker)

A little slow to start, but then excellent.

Book 19: Neuropath (Bakker)

Freaky.

Book 18: Gomorrah (Saviano)

Excellent non-fiction on organized crime in Naples. Truly wretched.