Little Bighorn Battlefield Guide
You can’t have too many of these; pick them up at the museum bookstore. In addition, the excellent map, the guide has a description of each stop, the order you should visit each location , excellent photos and an article on the clash of cultures. Remember, this guide does not cover the valley fight; you will need a separate source to help do that. But if you don’t take time to visit the valley, the rest of the battle will be more difficult to understand.