Michael Connelly - Harry Bosch Collection (Books 1 & 2): The Black Echo, The Black Ice (Harry Bosch Series)

The Black Echo
For maverick LAPD homicide detective Harry Bosch, the body in the drainpipe at Mulholland Dam is more than another anonymous statistic. This one is personal…because the murdered man was a fellow Vietnam "tunnel rat" who had fought side by side with him in a hellish underground war. Now Bosch is about to relive the horror of Nam. From a dangerous maze of blind alleys to a daring criminal heist beneath the city, his survival instincts will once again be tested to their limit. Pitted against enemies inside his own department and forced to make the agonizing choice between justice and vengeance, Bosch goes on the hunt for a killer whose true face will shock him.

The Black Ice
Narcotics officer Cal Moore's orders were to look into the city's latest drug killing. Instead, he ends up in a motel room with his head in several pieces and a suicide note stuffed in his back pocket.

Years ago, Harry Bosch learned the first rule of the good cop: don't look for the facts, but the glue that holds them together. Now, Harry's making some very dangerous connections, starting with one dead cop and leading to a bloody string of murders that winds from Hollywood Boulevard's drug bazaar to the dusty back alleys south of the border and into the center of a complex and lethal game—one in which Harry is the next and likeliest victim.