@deprecated_ii@poa.st is this the book?
This is the autobiography of Gerhard Neumann (1917–1997), a German-born mechanical engineer, machinist, and aviation pioneer who became a top executive at General Electric’s aircraft engine division. He earned the nickname “Herman the German” while serving with the Flying Tigers (American Volunteer Group) in China during WWII. The book covers his early life and training in Germany, escape from Nazi Germany (he was Jewish by birth), adventures in China (including mechanical work, a epic Jeep journey across Asia), U.S. Army service, and his major contributions to jet engine development (e.g., the variable stator compressor and work on the J79 engine).