Showing Bad Love by Jonathan Kellerman

It starts with a tape delivered to psychologist Alex Delaware's house - a recording of a soul-sickening scream followed by a twisted, childlike voice chanting 'Bad love. Bad love. Don't give me the bad love...' Alex heard that phrase a decade ago, at a symposium for Dr Andres de Bosch and his work with troubled teens, why is he hearing it now? Then there are strange phone calls, a horrific act of vandalism and the discovery that other symposium delegates have been murdered. Unless Alex can make sense of the mind games being played he will be next...