If you like Bosch, you might also like Ross Macdonald's Lew Archer detective novels, as well as Raymond Chandler's earlier Philip Marlowe series. Chandler's Marlowe was especially influential as one of the first and best hard boiled detectives, with the Rockford Files modeled on Marlowe by series co-creator Roy Huggins.
Chandler also inspired Connelly, who was a struggling business student at University of Florida in 1973 when he went to see The Long Goodbye, which was based on a novel by Raymond Chandler. Inspired to become a mystery writer, Connelly read Chandler's Philip Marlowe books and stories over a college break and then transferred to journalism and creative writing.
After graduation and newspaper reporting jobs in Florida, Connelly moved to L.A. to cover crime for the Los Angeles Times. Connelly's Bosch novels are based in many ways on those of Chandler.
But Connelly is well versed on the ins and outs of the legal issues that detail the modern facts of modern police procedure. He not only writes great stories but gives you a police procedural in the process. Killer.