This portrait of the Sierra Nevada has been a favorite among naturalists since it was originally published in 1970. Recently updated to reflect ecological research, it's a lyrical tour of the wildlife, plants and landscapes of the Sierra by Vera Johnston, a respected biologist, ornithologist and wildlife photographer. Johnston also writes of the Native Americans, residents, explorers and scientists of the Sierra. With 50 color photographs, 10 drawings and nine maps.  (CAL46, $21.95)