More books have been written about the Battle of the Little Bighorn than about any other battle in United States history—more, reportedly, even than about Gettysburg. There is almost literally no end to the volumes one could read. Here are just a handful of recommendations from Neil, our expert guide, and from myself, a non-expert, but dedicated student of the Indian Wars. Critics will cite strong points and solid analysis, as well as errors or notable shortcomings in each of these volumes, but such is the bookshelf for any great event in history.
Finally, the very best book on the battle for the general public remains the National Park Service handbook on the battle of the Little Bighorn, available online here. (NPS), and here (Internet Archive).