Although I have no specific complaint about this book, I actually didn't enjoy reading it as much as I had hoped, when it first came out. Leo Marks somehow just didn't make me want to read more, where Solly Zuckerman's book "from apes to warlords" which is about Operations Research and the bombing campaign in part totally did. Also R.V. Jones "most secret war" is a damn fine read.

If I remember it right, Leo Marks is the one who proved to the French their codes were completely bogus by breaking them, in front of their eyes with pen and paper. I bet they hated it, but it may have been highly beneficial it was irrefutable.