Duesenberg Aircraft Engines: A Technical Description
Aircraft Engine Design
Aircraft Propulsion: A Review of the Evolution of Aircraft Piston Engines
Rolls-Royce Merlin Manual - 1933-50 (all engine models): An insight into the design, construction, operation and maintenance of the legendary World War 2 aero engine (Owners' Workshop Manual)
The Engines of Pratt & Whitney: A Technical History (Library of Flight)