Come Tumbling Down

The fifth installment in New York Times bestselling author Seanan McGuire's award-winning Wayward Children series, Come Tumbling Down picks up the threads left dangling by Every Heart a Doorway and Down Among the Sticks and Bones.
When Jack left Eleanor West's School for Wayward Children she was carrying the body of her deliciously deranged sister—whom she had recently murdered in a fit of righteous justice—back to their home on the Moors.
But death in their adopted world isn't always as permanent as it is here, and when Jack is herself carried back into the school, it becomes clear that something has happened to her. Something terrible. Something of which only the maddest of scientists could conceive. Something only her friends are equipped to help her overcome.
Eleanor West's "No Quests" rule is about to be broken.
Again.
The Wayward Children Series
Book 1: Every Heart a Doorway
Book 2: Down Among the Sticks and Bones
Book 3: Beneath the Sugar Sky
Book 4: In an Absent Dream
Book 5: Come Tumbling Down