We just got in a copy of Russ Arendell and Steve Woodrum's new book on the Carcano, Italy's Battle Rifle: Story of the Mannlicher-Carcano Series of Rifles. It's the most useful reference book on the Carcano series that we know of, although it does have some shortcomings:

If you'd like to pick up your copy before they've stopped printing them, you'll need to contact Action Printing (ask for Stephanie) at either 806-745-5500 or (toll free) 800-226-5533.