Available from Amazon:
https://www.amazon.com/U-S-Model-Rifle-Americas-Enfield/dp/1931464928

Available from the publisher, Mowbray:
https://gunandswordcollector.com/product/us-model-1917-rifle-canfield/

Bruce Canfield is one of the most prolific and prominent authors on American military small arms today, with a bunch of excellent works in print. He has now tackled the Model 1917 Enfield rifle, the most common American rifle of World War One and yet a weapon not well covered by previous books. In this new book, Canfield covers its development form the British Pattern 1914, production and use in the US during World War One, interwar storage and refurbishment, World War Two use by both the US and allies, and post-war disposal of the rifles. He also covers a variety of accessories including bayonets, grenade launchers, slings, sniper models, and more.

This is definitely the best single book available on the M1917, although admittedly that isn't a high bar to clear. However, it is a book that definitely reinforces Canfield's reputation as a go-to authority on American martial small arms.