Nonfiction occasionally gets a bad rep -- how many times have you read a review for a "stuffy" or "plodding" biography? (My personal favorite put-down was when Kirkus called a recent history title "tough sledding.")
Sure, nonfiction RA has its challenges -- I never did quite figure out how to convincingly talk up map-filled tomes with gargantuan appendices when I was a public librarian -- but sometimes your readers just want a little true-to-life fun. While many of your patrons may associate the term "beach read" with light and fluffy fiction, why not give your nonfiction titles a little love and recommend them to patrons in need of some escapism? No maps involved (unless there's vacation travel planned).
Don't forget your sunscreen!