When master prankster Miles Murphy moves to sleepy Yawnee Valley, he challenges the local mystery prankster in an epic battle of tricks, but soon the two join forces to pull off the biggest prank ever seen.

"For twelve long years, the dread fortress of Azkaban held an infamous prisoner named Sirius Black. Convicted of killing thirteen people with a single curse, he was said to be a dedicated follower of the Dark Lord, Voldemort. Now he has escaped, leaving only two clues as to where he might be headed: Harry Potter's defeat of You-Know-Who was Black's downfall as well. And the Azkaban guards heard Black muttering in his sleep, "He's at Hogwarts...he's...