Quentin Jacobsen has spent a lifetime loving the magnificently adventurous Margo Roth Spiegelman from afar. So when she cracks open a window and climbs back into his life - dressed like a ninja and summoning him for an ingenious campaign of revenge - he follows.

After their all-nighter ends and a new day breaks, Q arrives at school to discover that Margo, always an enigma, has now become a mystery. But Q soon learns that there are clues - and they're for him. Urged down a disconnected path, the closer he gets, the less Q sees of the girl he thought he knew.

Printz medalist John Green returns with the brilliant wit and searing emotional honesty that have inspired a new generation of listeners.

John Green (whose full name anagrams to rejig, ole henchman) is the Printz Award-winning author of Looking for Alaska. John has also written for National Public Radio's All Things Considered and for The New York Times. He lives in New York City with his wife. Before he got married, he was dumped fifty-three times. But never by a Katherine. You can visit John on the Web at www.sparksflyup.com.