Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Vividly Realistic Police Procedural

The Black Echo (1992) introduces Harry Bosch, a famous homicide detective from Los Angeles, California, who has been exiled to the small-town Hollywood police force after killing an unarmed suspect. When Harry gets the call for a body in a drainpipe, he recognizes first the tattoo, and then the face of a former fellow "tunnel rat" from Vietnam. Though meant to look like an overdose death, Harry suspects murder and is soon deep into an unpopular investigation of bank robbery, diamonds, and more murders. Harry is an amazingly complex character who elevates this solid police procedural into a vividly realistic mystery. This winner of the 1993 Edgar Award for Best First Novel is highly recommended.http://www.stopyourekillingme.com/C_Authors/Connelly_Michael.html