When Catwoman boasts that she's the best burglar in Gotham City, Harley challenges her to a criminal contest. The first one to steal the Marble of Atlantis from the Gotham City Museum wins. Trouble is, Catwoman doesn't play fair. Can Harley outwit the crooked cat-burglar and bag her own bragging rights? Find out in this action-packed chapter book for DC Super Hero and Super-Villain fans!