See the below link for a promotional file on Robert O. Harder's latest publication, "The Three Musketeers of the Army Air Forces," hardcover, October, 2015, Naval Institute Press.
Naval Institute Press:Three Musketeers of Army Air Forces.pdf
See the below link for a promotional file on "Flying from the Black Hole," first published in hardcover in 2009, reprint softcover 2013,
Naval Institute Press:Flying From the Black Hole.pdf