See no evil. Hear no evil. Speak no evil. Do no evil. This is the mantra of the Four Monkey Killer who has been terrorizing Chicago for five years. Seven young women have been kidnapped, mutilated and murdered. Grizzly packages containing body parts were mailed to their families. And in each case, the innocent victim has been chosen for a reason. Someone who loves them is not innocent. The police have made the connection. While they haven't been able to save the victims, the guilty parties have been exposed. But the case has taken another bizarre turn. A man carrying a carefully wrapped box steps in front of a bus and dies. The box contains an ear. That means that there is a kidnapped girl who is probably still alive. Detective Sam Porter is determined to identify the killer and save the victim. But time is running out. The narration changes between the detective, the girl and the diary of 4MK. The last one gives insight into how a serial killer might be created. I lost sleep finishing this book but I certainly was never bored. The violence is quite graphic and might be too much for some readers. However, if you have a strong stomach, this is a gripping read.