I can't even remember the last one other than he turns in his badge for doing something unethical.
Supposedly a new Bosch series is "in the works" (hopefully) picking up where he is now working as an investigator for a private attorney Micky Haller-the character featured in "The Lincoln Lawyer". His daughter is now working full time for the LAPD in some capacity which brings about some family conflicts. Anyway that's what I got from an interview with Michael Connelly-author of all the Bosch books.