The Cliff House

Chris Brookmyre's take on a locked room mystery, where the room is a remote Scottish island, and the cast are attending a hen party that goes very very wrong. As always with this writer it's compulsively readable, and has the “just one more chapter” factor in spades. Twist piles on twist, motives swim into view and out again, and you're left guessing who is behind it all until the rug is pulled out from under you. Terrifically entertaining.