HITLER'S PEOPLE -Richard J. Evans

A series of essays on various people in Nazi Germany, from Hitler down to camp guards.

Each essay is standalone, a benefit is there is very little repetition .  A very good overview with a conclusion that stands up.

Recommended.
 

THE SPY WHO WAS LEFT OUT IN THE COLD - Tim Tate

Interesting but not riveting.
 

MASK OF TREACHERY -John Costello

 

Supposedly a biography of Anthony Blunt, but what we get is a very detailed history of the Cambridge spy's as a whole. Very detailed, very interesting.

THE MAN WHO WAS M The Life of Maxwell Knight - Anthony Masters

Not great writing, but it has some interesting snippets about MI5.  Knight himself was a cot case but as the entire organization was full of public school boy fools he didn't really stick out