The American Civil War bibliography comprises books that deal in large part with the American Civil War. There are over 60,000 books on the war, with more appearing each month. Authors James Lincoln Collier and Christopher Collier stated in 2012, "No event in American history has been so thoroughly studied, not merely by historians, but by tens of thousands of other Americans who have made the war their hobby. Perhaps a hundred thousand books have been published about the Civil War."