"A magnificent quest, a sense of unfolding adventure and danger, gold-wrought fantasy, and endless provocation on what storytelling really means." (*Library Journal)
"A puzzlebox of a book, full of meta-narratives and small folkloric tales that will delight readers. [Morgenstern] trusts her readers to follow along and speculate, wonder, and make leaps themselves as she dives into tales of pirates, book burnings, and men lost in time, giving the book a mythic quality that will stick with readers long after they put it down." (*Booklist)
"A high-wire feat of metatextual derring-do, Morgenstern weaves Zachary's adventure into a stunning array of linked fables, myths, and origin stories... exquisitely pleasurable.. a love letter to readers as much as an invitation: Come and see how much magic is left in the world. Fans of Neil Gaiman and V.E. Schwab, Kelly Link and Susanna Clarke will want to heed the call. An ambitious and bewitching gem of a book with mystery and passion inscribed on every page." (STARRED Kirkus Review)

The magical new novel from the bestselling author of The Night Circus.
Zachary Ezra Rawlins is a graduate student in Vermont when he discovers a strange book hidden in the library stacks. As he turns the pages, entranced by tales of lovelorn prisoners, key collectors, and nameless acolytes, he reads something strange: a story from his own childhood. Bewildered by this inexplicable book and desperate to make sense of how his own life came to be recorded, Zachary uncovers a series of clues ? a bee, a key and a sword ? that lead him to a masquerade party in New York, to a secret club, and through a doorway to a subterranean library, hidden far below the surface of the earth.
What Zachary finds in this curious place is more than just a buried home for books and their guardians ? it is a place of lost cities and seas, lovers who pass notes under doors and across time, and of stories whispered by the dead. Zachary learns of those who have sacrificed much to protect this realm, relinquishing their sight and their tongues to preserve this archive, and also those who are intent on its destruction.
Together with Mirabel, a fierce, pink-haired protector of the place, and Dorian, a handsome barefoot man with shifting alliances, Zachary travels the twisting tunnels, darkened stairwells, crowded ballrooms, and sweetly-soaked shores of this magical world, discovering his purpose ? in both the mysterious book and on his own life..