The unputdownable new novel by the bestselling author of CODEX. Deep in the forests of the magical land of Fillory a disturbing secret is discovered, one that could change the course of history and ruin many lives. As acting king, Quentin Coldwater embarks upon an epic mission, visiting the terrifying depths of the underworld, to uncover the key to saving his world. Lev Grossman's beautiful new novel allows the imagination to run riot.