Well, we have a list of books set in the Evergreen State of Washington for you below. Popular Book Series Set in Washington StateI knew there were a couple of books set in Washington State. I'm a huge fan of Patricia Briggs, whose Mercy Thompson series is set in the Tri-Cities. LOOK (IT'S IN A BOOK): Books Set In Washington Stacker compiled a list of books set in Washington from Goodreads. Share Your Favorite Washington ReadsWhich books did we miss?