Paper Towns by John Green
Quentin Jacobsen is a genius! He hangs out with geniuses and he has a perfect attendance record at high school! NERD you might say, but then one night, Margo Roth Spiegelman, the girl next door he has loved from afar all his life, climbs into his bedroom window dressed for stealth and wanting HIM! Well his driving skills actually, as she sets out on a night of revenge on her ex-boyfriend and others. Think photo of ex running down the street with items of his anatomy hanging out and dead fish under seats of cars! Then the next day she disappears, leaving him clues to follow as to where he might find her. His friends help to try and solve the puzzle but will it end with them finding her alive or dead?