Reddit reviews Northwest Foraging: The Classic Guide to Edible Plants of the Pacific Northwest

http://www.amazon.ca/Northwest-Foraging-Classic-Edible-Pacific/dp/1594853665

Northwest Foraging: The Classic Guide to Edible Plants of the Pacific Northwest

Pacific Northwest Foraging: 120 wild and flavorful edibles from Alaska blueberries to wild hazelnuts

FIELD GUIDE TO FORAGING IN THE NORTHWEST

I'd usually recommend http://northernbushcraft.com/ but the site seems to be down.

http://www.amazon.com/Northwest-Foraging-Classic-Edible-Pacific/dp/1594853665 is a great book about it. Check your local library.

Northwest Foraging sounds like what you're looking for. Good book. Includes recipes. Only complaint is that the illustrations are all in black and white, so sometimes you'll have to read over the descriptions very carefully if you're not sure about a specific plant. It's a minor issue, but I'd like to see full-color photos in future editions.

And Northwest Foraging, which is right next to Plants of the Pacific Northwest Coast on my bookshelf.