Imagine sending a number of nature writers out into the same unrelenting stretch of Sonoran Desert. Then consider telling them to focus their attention on just one animal--Ovis canadensis, popularly called the desert bighorn or borrego cimarr n--and have them write about it. Have them write from makeshift blinds or from behind a gun barrel. Have them write while walking across the Cabeza Prieta at night, or while flying over it trying to radio-collar...