I voted for The Eyre Affair by Fforde, a brilliant and hilarious book. And a good crime story as well.
I met Mr Fforde at a Book Fair in Sweden a few months back and even though he didn't seem to know that much about the workings of ebooks, or rather ereaders, he graciously signed my copy of "Lost in a Good Book" on my Sony Touch.
If you haven't read any of his books - don't miss them. Highly recommended.