Susan Hill meets Wilkie Collins in Alison Littlewood's latest chiller: mad-doctor Nathaniel is obsessed with the beautiful Mrs Harleston - but is she truly delusional? Or is she hiding secrets that should never be uncovered . . . ?

Haunted by his father's suicide, Nathaniel Kerner walks away from the highly prestigious life of a consultant to become a mad-doctor. He takes up a position at Crakethorne Asylum, but the proprietor is more interested in phrenology and his growing collection of skulls than the patients' minds. Nathaniel's only interesting case is Mrs Victoria Harleston: her husband accuses her of hysteria and delusions - but she accuses him of hiding secrets far more terrible.

Nathaniel is increasingly obsessed with Victoria, but when he has her mesmerised, there are unexpected results: Victoria starts hearing voices, the way she used to - her grandmother always claimed they came from beyond the grave - but it also unleashes her own powers of mesmerism . . . and a desperate need to escape.

Increasingly besotted, Nathaniel finds himself caught up in a world of séances and stage mesmerism in his bid to find Victoria and save her.

But constantly hanging over him is this warning: that doctors are apt to catch the diseases with which they are surrounded - whether of the body or the mind . . .

'[An] enjoyable excursion . . . gripping' The Sunday Times