Lucky number 13 is The Serpent of Venice by Christopher Moore.

We once again visit with Pocket, the protaganist of Fool, who has gone to Venice on behalf of his Queen, Cordelia, and has of course, gotten himself in trouble. He ends up falling into a situation that combines the Bard's Othello and the Merchant of Venice, and somehow, this works surprisingly well.

There's the usual mad, bawdiness of Pocket (who could definitely become annoying, but it's testimony to Moore's craft that he never does), lots of violence and plotting, and of course, there's always a bloody ghost.

Only Christopher Moore could take a tragedy and a psuedo comedy and make a definite comedy complete with happy ending. And a dragon. Cause Shakespeare could actually use more dragons.