It Cuts Both Ways — Jack Tate

Alex Rain is a 30-something, somewhat eccentric anatomy professor who is finding it increasingly difficult to fit into the world around him. Alex tries desperately to escape his past and to control the darkness that has followed him his whole life. A darkness that he created, one that he has nurtured and one that he has come to enjoy. Whilst Alex deals with his inner demons, he encounters something that has eluded him since high school. He falls in love. Alex quickly finds himself in unchartered territory at a time where he seems to be giving in to his dark temptations. Bodies start to pile up across the city and Alex fears that he can no longer control the evil that lurks inside him.