Many Northwest divers have spent a good deal of time to bring you detailed information on local dive sites. Check out their links below.
Sea Otter, Shore and Boat Dive Sites - Lists many of the dive sites in the Northwest with information on the common marine life observed at each location.

Northwest Boat Dives
by Dave Bliss
This book is currently out of print, but you can follow this link to Amazon's page and maybe find some used copies. Lists around 60 dives, some of which are accessible as shore dives. Still a good resource for the private boat owner.