If you like Riding the Flume and redwood trees, you might want to check out these books:
Andrews, Ralph. Redwood Classic. New York, 1958. The history of logging in California.
Dilsaver, Larry M. and William C. Tweed. Challenge of the Big Trees: A Resource History of Sequoia and Kings Canyon National Parks. Three Rivers, CA 1990. This book focuses on the human story around the creation of these national parks.
Johnston, Hank. They Felled the Redwoods; A Saga of Flumes and Rails in the High Sierra. Fish Camp, CA 1996. Go to this book for fabulous photos of the Sequoias and learn how they were cut down.
Peattie, Donald Culross. A Natural History of Western Trees. Houghton Mifflin Co. Boston, 1953. Biological information on the trees. His description of Sequoias also captures their quiet majesty.
Sargent, Shirley. Pioneers in Petticoats: Yosemite’s Early Women 1856-1900. Yosemite, CA, 1966. This book and the two following will give you a good idea of the unconquerable spirit of the woman who helped settle California.
Seagraves, Anne. Women of the Sierra. Hayden, Idaho, 1990.
Zauner, Phyllis. Those Spirited Women of the Early West: A Mini-History. Sonoma, CA 1994.
Here are some great links to information about sequoias and logging:
Sierra Redwoods: this page has photos of sequoias, as well as information on size. (http://www.parks.ca.gov/default.asp?page_id=1145)
Sequoia and Kings Canyon National Parks : the official web site. (http://www.nps.gov/http://www.nps.gov/seki/seki/)