Real what you like, they are all good books, written by experts, mostly cops and detectives. It's pretty technical stuff, but you will enjoy them. Policing before the incident. That's the complicated part of policing. In the first place, in general, only cops do policing.
Investigators act only after the incident.
Thus, a failure of policing, i.e., a crime, leads to the investigative function. There are questions of patrol deployment, strategies, crime patterns, etiologies, data collection, probabilities, supervision, tactics, and resource maximization. These need to thought through by the police staff and then implemented to arrive at immediate reductions in crime. This could be called excellence in the patrol function. The implementation strategy also needs to be relentless.