Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Seashore Life of the Northern Pacific Coast
By Eugene N. Kozloff
University of Washington Press, 2000
ISBN: ISBN 0-295-96084-1
Cite: 94014
This book covers everything from plants to marine mammals along the coast of the Pacific, as well as Puget Sound, the Strait of Georgia, the San Juan Archipelago and San Francisco Bay.

I have found it extremely useful and it includes many of the mites, insects, isopods, etc. that may be found when visiting the beach.