An "enchanting" (Caroline Kepnes, author of You) "fairy-tale-inflected thriller" (The New Yorker) about two sisters who encounter a captivating yet possibly dangerous underworld cult that challenges their perception of reality. Rose has come a long way. Raised--and often neglected--by a wayward mother in New York City's chaotic bohemia, she has finally built the life she's always wanted: a good job at a self-help startup,...