The Death Sommelier

This is the third novel featuring USGS geologist Dr. Fred Sager as the protagonist. Set on the Navajo Reservation in northeast Arizona, Fred is sent to examine the deaths of several Navajo people because their demise was originally believed to be caused by contaminated groundwater, a subject which he knows well. Through his association with the Indian Public Health Hospital in Shiprock, N.M. Fred suspects otherwise. His major distraction, however, is related to a Navajo girlfriend from his past: what's become of her? Where is she?