Picked for BBC Radio 2's Book ClubEveryone said the Graces were witches. They moved through the corridors like sleek fish, ripples in their wake.

Stares followed their backs and their hair. They had friends, but they were just distractions.

They were waiting for someone different. All I had to do was show them that person was me. Like everyone else in her town, River is obsessed with the Graces, attracted by their glamour and apparent ability to weave magic.

But are they really what they seem? And are they more dangerous than they let on? This beautifully-written thriller will grip you from its very first page.