You might want to spring 99¢ loose from the rainy day fund for his first book,
Access to Power which also got good reviews upon first publication a decade ago.
After these two, he moved on to writing a series concerning Lena Gamble, a young LAPD detective promoted from Hollywood to the elite Robbery-Homicide Division. To date, these include "City of Fire", "The Lost Witness" and "Murder Season". For some reason these latter are somewhat cheaper at Kobo (at least in Canada) than Amazon as Kindle.