I'd love to find something funny (fiction or non-fiction) for my son, who's about to turn 13. He does still read books (!) but has a non-stop diet of spies and thrillers - CHERUB and that sort of thing.
So many books for teens seem to be so heavy and either terribly worthy or nastily violent.
He's definitely not into girlfriends or looking cool or that sort of thing. When he was younger he liked Horrible Histories (still does) as an indication of the sort of humour.