“A story that will both warm your heart, and chill you to the bone."—KENDARE BLAKE, New York Times bestselling author of Three Dark Crowns “Dark and complex and wickedly romantic.”—GRETCHEN MCNEIL, author of Ten  A girl discovers a family secret and a past full of magic that could both save her and put her in mortal danger in this suspenseful novel that's perfect for fans of Katie Alender and Natasha Preston. All sixteen-year-old Heather MacNair wants is to feel normal, to shed the intense paranoia she’s worn all year like a scratchy sweater. After her compulsion to self-harm came to light, Heather was kept under her doctor’s watchful eye. Her family thinks she’s better—and there’s nothing she wants more than for that to be true. She still can’t believe she’s allowed to spend her summer vacation as she always does: at her aunt’s home in Scotland, where she has lots of happy memories. Far away from all her problems save one: she can’t stop carving the Celtic knot that haunts her dreams into her skin. Good friends and boys with Scottish accents can cure almost anything . . . except nightmares. Heather can’t stop dreaming about two sisters from centuries ago, twins Prudence and Primrose, who somehow seem tied to her own life. Their presence lurks just beneath the surface of her consciousness, sending ripples through what should be a peaceful summer. The twins might hold the key to putting Heather’s soul at rest . . . or they could slice her future deeper than any knife. ***  “An eerie blend of mystery and magic amid the Scottish highlands.”—MINDY MCGINNIS, author of A Madness So Discreet and The Female of the Species “A haunting and mysterious page turner.”—KATE KARYUS QUINN, author of Another Little Piece  "A chilling gothic thriller . . .  fans of Katie Alender’s Bad Girls Don’t Die series will appreciate this work and its spine-chilling twists."--SLJ “A thoroughly enjoyable contemporary Gothic.”—Kirkus “A perfect choice for fans of chilling supernatural reads.”—Booklist A YALSA 2018 Best Fiction for Young Adults Selection