Something in the walls : a novel

Journalist Sam Hunter has a proposition for newly-minted child psychologist Mina. Alice Webber is a thirteen year old girl who claims she's being haunted by a witch. Taking this job will give Mina some experience; Sam will get the scoop of a lifetime; and Alice will get better, Mina is sure of it. But instead of improving, Alice's behavior becomes increasingly inexplicable and intense.