Old World War Two vintage - Pilots' Powerplant Manual - by L. E. Shedenhelm and published by the U. S. Department of Commerce - Civil Aeronautics Administration, Washington, D.C.. This is Civil Aeronautics Bulletin No 28, October 1940. Great for showing the level of American airplane engine technology just prior to entering the Second World War.
This manual has 392 pages with lot of great photos, illustrations, schematics, drawings and more. There is even a color fold out chart showing the lubrication system for aircraft engines.
This manual is in nice vintage condition, but the paper cover has been reinforced with tape in the past, and the back of the cover is loose (but included).