Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Ghosts from the past

It is Christmas, and Harry Bosch is on standby to take calls for any murders. He has the police scanner on, and hears a report of an incident within his jurisdiction. When he investigates, he becomes involved in a messy case involving a police officer. Things develop from there.There is a lot about bureaucracy and bean counting in the police department. Increase the number of arrests and increase the percentage of solved cases to make the atatistics look good when the budget request goes in. There are continuing conflicts between Harry and his superiors, but there are some tradeoffs. Not everything is as it seems, but everyone seems to come away with something. Sometimes it's better not to look too close.Black ice, by the way, is a new form of narcotic - an emerging recreational drug showing up on the scene.The novel is also available as part of the omnibus collection, "The Harry Bosch Novels."