I have not read it, but I recently noticed this in bookstore:

The Quiet Professional: Major Richard J. Meadows of the U.S. Army Special Forces, by Alan Hoe. The University Press of Kentucky, 2011.

The author is a veteran of Special Air Service and first met Meadows in 1960 during Meadows’ exchange with SAS. Saw there was a chapter on the Son Tay raid.