Navajo Detective Jim Chee, working now for Lt. Joe Leaphorn's two-man Special Investigations Office, has followed Delmar Kanitewa, a runaway student who may know something about the murder of shop-teacher Eric Dorsey, to the Tano Pueblo for a ceremony of koshares, sacred clowns, only to see it interrupted by a second murder. The boy, who's exonerated by Chee's own eyes, has vanished again, leaving the mystery of how the two murders are connected--and (since this is one of Hillerman's most intricately plotted stories) of just how to interpret the eventual linkup: a copy of the Lincoln Cane, a century-old tribal gift, that Dorsey had made. There's also time for the reopening of an unsolved hit-and-run and for accusations that Horse Mesa Councilman Jimmy Chester is taking bribes to legalize a toxic-waste dump inside a reservation mine. The byplay between prickly Leaphorn and spiritual Chee; Chee's sobering reflections on Navajo and white people's justice; problem-strewn new romantic intrigues for both heroes--all of these make this not only a masterful novel in its own right, but an object lesson in how to develop an outstanding series.