Hunting Badger, set in the Four Corners region of the US (junction of New Mexico, Arizona, Colorado, and Utah, which come together at four perfect 90-degree angles) which will be familiar to Hillerman's devoted readers, focuses on the violent ripoff of a casino on the Ute reservation. The wonderful character list includes the usual reservation cops, and a lady interest for both Leaphorn (whose beloved wife has died) and Chee (who took fer-frikkin'-ever to get over Janet Pete, his first love). But just as strong a character is the land itself, always a forceful and important presence in TH's wonderful books. There's even mining geology information in Hunting Badger. What you get in a good Tony Hillerman book is more than a story with memorable characters told in economical prose; you also get vivid mental pictures of the bleak beauty of the Southwest, insightful glimpses of Navajo culture, geology and geography lessons, and spiritual shaman lore.
For character development and follow-through, don't read this first; go back at the very beginning of this Leaphorn/Chee series and start with the first one. But if you just want a good book to read on the plane and this is the one that's available in the airport bookstore, then go ahead and buy it. You won't regret it.