Beneath and Beyond by Claudette Cleveland

Murder, abuse and mayhem ravage the Navajo reservation where Tashi, Althea and Morning Star (human ambassadors for aliens from one of the Hidden Cities on Earth) are sent to change the course of self-destruction for the Native Americans. Is black magic the cause of the havoc? Handsome Navajo detective George Trueeyes, who is more than he appears to be, doesn't think so. This Southwest-flavored adventure is so thought-provoking and enlightening that you won't be able to put it down. Beneath and Beyond: The Thunderbirds is loaded with surprises and startling twists that pull you in and refuse to let go. Although this book is fiction, it was inspired by the author's experiences with Native Americans in the Southwest. It is a sequel to Beneath and Beyond, The Hidden City.