I read a lot when I travel -- I can easily read a book a day or more on a beach vacation.
Some resorts (FS Costa Rica, Little Dix Bay) have carts or shelves where you can leave a book or take a book -- and I am happy to say I've left dozens over the years. I also leave them on airplanes or in hotel rooms. I've never left a note -- I figure sooner or later, someone will grab it.