A thorough-going primer on the geology, ecology and landscapes of Wyoming with dozens of maps, diagrams, drawings and black-and-white photographs. The author, a professor of botany at the University of Wyoming, pays particular attention to Yellowstone National Park, Jackson Hole, Grand Teton National Park and the Black Hills. Divided by habitat, it's an excellent overview of the ecology of Wyoming and adjoining states, of interest to both serious students and curious travelers.  (USW64, $28.00)