Just finished an "encore presentation" of one of the Prey books by John Sandford. I own almost all of them as well as his Virgil Flowers books. The crime procedure/mystery books are my favorite regardless who writes them. But, I find myself overewelmingly happy each time I get a new one.
Following that genre, my fav authors would be-
Sadly Harstad only did 6 books before apparantly giving up his alter-ego of Deputy Carl Houseman.