Same here, waiting for the next one to come out.
In the meantime I have started on the Michael McGarrity novels, set in New Mexico. I began with his American West Trology and really enjoyed them, then I realized that he wrote those as a prequel to the Kevin Kerney series. I have read the first couple of those, they are pretty good.
Have also sampled a couple of the easern game warden, Mike Bowditch, in Maine, by Paul Doiron. They are ok, but I’m not a enthusiastic about them as I am about Joe Pickett.
I have been too lazy to look and see which one came along first, who copied who.