If you are American, and you are thinking about the libraries Andrew Carnegie donated all across the country---free, and in small towns, cities, and tiny hamlets---then think again. There is no such thing.
If you are a reader, you should get a kindle. If you are a Luddite who insists on lugging around books, you can have good luck at certain Anglo/Euro hotels (Hotel Tropix in Sosua is one such) where you can take a book and read and then the next time you come, return it or bring another. But I don't get this kindle snobbery: I read 3-4 books a week. I have 400 books on my kindle and it fits in my handbag. I have the complete works of Dickens, Shakespeare, Austen, the Brontes, Harry Potter (go ahead: laugh), Sir Arthur Conan Doyle, Leonardo Padura, Gabriel Garcia Marquez, Junot Diaz, Isabel Allende, Julia Alvarez, Victor Hugo, all of the Mitford Sisters, etc., etc. I can read in the dark, at the beach, at restaurants, with the touch of a button.
In high school in a small town in Massachusetts, I worked at the local Carnegie library. One of the best things I ever did. As an adult, I worked at The New York Public Library for 3 years as the associate director of major gifts and planned giving and there is nobody more dedicated to reading than I am.
But totally unfortch, this country is not committed to reading. We're a long way from it, and when my espanol is better, this may be my cause. In the meantime, my literate friend: use your kindle.