A darkly enchanting gothic fantasy book about a girl who strikes a dangerous bargain with a cursed ghost and unravels a twisted destiny-perfect for fans of One Dark Window and The Phantom of the Opera. Élisabeth Bellacourt has grown up hidden under the glory of her beautiful half-sister Louise her entire life. Louise is always cast as the lead in their ballet performances and even the man Élisabeth's heart longs for only has eyes for her sister. As the daughters of the esteemed Hugo Bellacourt owner of the National Opera House, the infamous, slightly decrepit building with whispers of the devil living in the catacombs, they live a life of prestige and respect. When Élisabeth learns that her father is in danger, she strikes a bargain with the Phantom who haunts the catacombs. Thrust into the Graylands, a bleak, mist-filled world packed with ghosts and treacherous beasts, she finds herself on a quest to unravel an ancient prophecy. Because the Graylands is in danger of coming undone, and if she ever hopes to return home, Élisabeth must find a way to save it and work alongside Séverin, the mysterious boy who rules this underground realm. Together they must find the Book of Echoes-which is said to hold the secrets of the realm of the Dead. As they hunt for the truth and the attraction between her and Séverin heightens, Élisabeth begins to learn the truth about her deadly magic and finds herself caught between loyalty and betrayal.