An old friend of mine, Running Squirrel (now passed), taught me most of what I know about foraging. The book that he made me buy and has been an essential tool in my box is Discovering Wild Plants - AK, W. Canada, The Northwest by Janice Schofield. It has everything that grows anywhere in the state and it's uses - edibility, medicinal, etc. I would highly recommend this guide to anyone who forages, novice or expert. I have perhaps a dozen others but they don't come close to this one.