From the #1 bestselling author of The Fault in Our Stars Winner of the Edgar Award for Best Young Adult Mystery New York Times bestseller USA Today bestseller Publishers Weekly bestseller Â When Margo Roth Spiegelman beckons Quentin Jacobsen in the middle of the nightÂ—dressed like a ninja and plotting an ingenious campaign of revengeÂ—he follows her. Margoâ€™s always planned extravagantly, and, until now, sheâ€™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 theyâ€™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.