In reply to Joe H., the Historical Society has a bookstore on-site and has an extensive selection of new and used books pertaining to Humboldt County. There's a discount for members and oftentimes specials for everyone. The current inventory (and specials) are available at https://www.humboldthistory.org/bookstore. They provide both in-person sales and you can order for shipping. read more
Located in a historic house in the city of Eureka, CA, it houses a research library of historic documents and photographs related to Humboldt County. While it has a library of books I am not sure why Yelp listed it as a bookstore. read more