If you design and build your library well—and the books do not just sit inside for months at a time—you shouldn’t have any problems. Make sure your library’s door closes securely; make sure your roof has an overhang to stop water from running down the sides and into the library; and look over our tips for building a weatherproof library on the Build section of our website. Keep in mind that Little Free Library started in Wisconsin. It gets very cold and very hot, very wet, windy and buried in snow here … but Little Free Library book exchanges survive.