Under the Skin, by Michael Faber

Oh good grief. This is the most scary and brilliant of books. It had me hooked from the start.

There is something strange going on and, at the beginning, it's impossible to put your finger on it. A woman is driving endlessly around the same area in a remote part of Scotland, looking for hitchhikers to pick up. But not just any old hitchhiker. They have to be male, well-built, sturdy, and with a bit of muscle.

It helps if they don't have a wife or family, or if no-one is expecting them home. But she's not that fussed about all of that.