That is up to you. We encourage you to make it easy to find and open to the public. A big part of the fun is meeting new people! We do know of seasonal Little Free Library book exchanges or ones that are located on private campuses. If your library is in a private location but you still want to register it, go for it. Just remember that if it is listed on the Little Free Library mobile app and web map, people will come looking for it. Please do not add it to the map if the average person will not be able to find or use it.