From the #1 bestselling author of Turtles All the Way Down and The Fault in Our Stars Winner of the Edgar Award for Best Young Adult Mystery #1 New York Times Bestseller USA Today Bestseller Publishers Weekly Bestseller Now a major motion picture When Margo Roth Spiegelman beckons Quentin Jacobsen in the middle of the night--dressed like a ninja and plotting an ingenious campaign of revenge--he follows her. Margo s always planned extravagantly and until now she s always planned solo. After a lifetime of loving Margo from afar things are finally looking up for Q . . . until day breaks and she has vanished. Always an enigma Margo has now become a mystery. But there are clues. And they re for Q. Printz Medalist John Green returns with the trademark brilliant wit and heart-stopping emotional honesty that have inspired a new generation of readers.