"A novel"--Jacket.

"Amelia Matthew has done the all-but-impossible, especially for an orphan in Gilded Age New York City: along with her foster brother Jonas, she has parleyed her modest psychic talent into a safe and comfortable life. But safety and comfort vanish when a head injury leaves Amelia with a dramatically-expanded gift. After she publicly channels an angry spirit, she finds herself imprisoned in the notorious insane asylum on Blackwell's Island. As Jonas searches for a way to free her, Amelia struggles to control her disturbing new abilities and survive a place where cruelty and despair threaten her sanity"--Dust jacket.