The Big Over Easy by Jasper Fforde

We all know that Humpty Dumpty sat on a wall and had a big fall... but what if the reason he fell was that someone shot him? This is a clever, funny mystery with lots of references to nursery rhyme characters who are alive, well, and quirky in Fforde's imaginary England where literary characters are just as alive as we are. A very fun read. If you enjoy this, I would also recommend The Eyre Affair, also by Fforde.