Turn of the century, new York city. Serial killer on the loose and the head poliece chief and famous shrink work together to track him down
Ir you like thrillers, GET IT....its a bit long, but amazing. the author really "puts you in the bowerys of turn of the century NY"
you can snag it here
http://www.amazon.com/Alienist-Caleb-Carr/dp/0553572997