A Snowball in Hell — Christopher Brookmyre

Each society gets the serial killers it deserves...
Simon Darcourt, an inventive killer with a sense of humour, is creating his own celebrity talent show, one that is generating more publicity than its contestants have ever had in their lives. The catch is that those lives won't be very long. The police turn to Angelique de Xavia, a cop who has crossed his path before. However, the police are not the only people who want Darcourt. Now she's faced not only with tracking him down, but also with the task of ensuring she doesn't end up dead once she's served her purpose. Scared and alone, Angelique knows she's got a snowball's chance of pulling this off, which is why she's going to need a little magic...