Cascade - Olympic Natural History: A Trailside Reference, Second Edition, Daniel Matthews, 1999, Raven Editions
Olympic National Park: A Natural History, Tim McNulty, 2003, University of Washington Press
Olympic National Park Nature Guide, Larry and Nancy Eiffert, 2001, Estuary Press
Olympic: The Story Behind the Scenery, Henry C. Warren, 2004, KC Publications, Inc.
Olympic: The Continuing Story, Janet Scharf, 1993, KC Publications, Inc.
PLANTS AND TREES
Cascade - Olympic Natural History: A Trailside Reference, Second Edition, Daniel Matthews, 1999, Raven Editions
Plants of the Pacific Northwest Coast, Jim Pojar and Andy MacKinnon, 1994, Lone Pine Publishing
Wildflowers of the Olympics and Cascades, Revised Edition, Charles Stewart, 1994, Nature Education Enterprises
Forest Giants of the Pacific Coast, Robert Van Pelt, 2001, Global Forest Society and University of Washington Press
Northwest Trees, Stephen F. Arno and Ramona P. Hammerly, 1977, The Mountaineers
ANIMALS
Animal Tracks of Washington and Oregon, Ian Sheldon, 1997, Lone Pine Publishing
Cascade - Olympic Natural History: A Trailside Reference, Second Edition, Daniel Matthews, 1999, Raven Editions
National Audubon Society Field Guide to Mammals, Revised Edition, John O. Whitaker, Jr., 1996, Chanticleer Press, Inc.
Olympic National Park Nature Guide, Larry and Nancy Eiffert, 2001, Estuary Press
The Banana Slug, Alice Bryant Harper, 1988, Bay Leaves Press
Birds of the Pacific Northwest Mountains, Nancy Baron and John Acorn, 1997, Lone Pine Publishing
The Forest Elk, Bruce B. Moorhead, 1994, Northwest Interpretive Association
COASTAL RESOURCES
The Beachcomber's Guide to Seashore Life in the Pacific Northwest, J. Duane Sept, 1999, Harbour Publishing
Exploring the Seashore, Gloria Snively, 1978, Gordon Soules Book Publishers Ltd.
Olympic National Park: A Natural History, Tim McNulty, 2003, University of Washington Press
Seashore of the Pacific Northwest, Ian Sheldon, 1998, Lone Pine Publishing
Tidepool and Reef, Rick M. Harbo, 1980, Hancock House Publishers, Ltd.
MOUNTAINS
Geology of Olympic National Park, Rowland W. Tabor, 1987, Northwest Interpretive Association
Olympic National Park: A Natural History, Tim McNulty, 2003, University of Washington Press
HOMESTEADS AND RECENT HISTORY
Beyond the Trails: With Herb and Lois Crisler in Olympic National Park, Francis E. Caldwell, 1998, Olympic Graphics Arts, Inc.
Footprints in the Olympics: An Autobiography, Chris Morgenroth, 1991, Ye Galleon Press
The Land That Slept Late: The Olympic Mountains in Legend and History, Robert L. Wood, 1995, The Mountaineers
There Was a Day: Stories of the Pioneers, Lonnie Archibald, 1999, Olympic Graphics Arts, Inc.
NATIVE AMERICANS
Cedar, Hilary Stewart, 1984, University of Washington Press
Hunters of the Sea, R. Stephen Irwin M. D., 1984, Hancock House Publishers, Ltd.
Looking at Indian Art of the Northwest Coast, Hilary Stewart, 1979, University of Washington Press
Native Peoples of the Olympic Peninsula, The Olympic Peninsula Intertribal Cultural Advisory Committee, edited by Jacilee Wray, 2002, University of Oklahoma Press