'Make them stop,' she pleaded. 'The wolves are howling again. Please make them stop.' Then she suddenly started whispering, her lips very close to my ear - and she wasn't whispering in any language I could understand...

A brutal serial killer stalks the Seattle nights. Regina Greenleaf was one of the victims. Her beautiful twin sister, Renata, is deeply traumatised.

She talks only rarely, and then always in twin-speak, the special language she and Regina made up long before they'd learned to speak English.

Mark, a college lecturer in English and the twins' friend, is the only person Renata will talk to. She agrees to attend his classes, and with the help of Mark's room-mates she seems to be coming to terms with her loss.

But the number of murders in Seattle rises, and Mark has some dreadful suspicions. If he says anything, it's guaranteed to send Renata back to the hospital. But if he doesn't there may be blood on his conscience...

Part murder mystery, ghost story, and psychological thriller, Regina's Song masterfully fuses together elements that elicit our deepest, darkest fears...