Leaphorn & Chee is a series started by Tony Hillerman. When he died, his daughter, author Anne Hillerman, took over the series. A moderator at our Google newsgroup, Charlene D’Avanzo, calls this an environmental mystery series. According to Charlene:
I call them environmental mysteries – novels in which the natural environment is as important as any character. Tony Hillerman tops that list for me. In his very popular Chee/Leaphorn mysteries readers smell, feel, see, and taste the scorching, sun-drenched, thirsty desert.