The Baltimore Book Thing is a wonderful place that takes donations of books and magazines and organizes them in their "store" (which looks a lot like a library). Anyone can take whatever books they want and however many they want for FREE as long as they agree not to resell them. This keeps dealers from using it as a free stocking source. I think the guy who runs it gets grant money but they can also always use donations of other supplies to help keep them going. Check out their website to see how you can help, and then stop by and pick up a few books to read!