Cascade-Olympic Natural History : A Trailside Reference

Field Guide to the Cascades and Olympics

Natural History of the Pacific Northwest Mountains (A Timber Press Field Guide)

Plants of the Pacific Northwest Coast

Wildlife of the Pacific Northwest: Tracking and Identifying Mammals, Birds, Reptiles, Amphibians, and Invertebrates (A Timber Press Field Guide)

Sibley Birds West: Field Guide to Birds of Western North America

Birds of the Pacific Northwest (A Timber Press Field Guide)

Roadside Geology of Washington

Rocky Mountain Natural History: Grand Teton to Jasper

Olympic Mountains Trail Guide: National Park & National Forest 3rd Edition