The Defence of the Realm revealed by Peter Wright decades before in Spycatcher), as well as noting how many of Wilson's MP's were spying for the Soviet bloc. The book's title was derived from MI5's Latin motto, "Regnum Defende". Historian Keith Jeffery was commissioned to write a similar authorised history on the Secret Intelligence Service (MI6) for release in 2010. The book received generally positive reviews from major newspapers. "The Daily Telegraph" called it "magisterial, authoritative, balanced, readable ... full of wry humour and with an eye for the absurd", declaring that "MI5 could not have wanted a better historian than him. This book is
The Black Book of Communism by Joachim Gauck. The introduction was written by Courtois. Historian François Furet was originally slated to write the introduction, but was prevented from doing so by his death. The book has been translated into numerous languages, sold millions of copies and is considered one of the most influential, although one of the most controversial, books written about communism. The book's title was chosen to echo the Jewish Anti-Fascist Committee's "Black Book", a documentary record of Nazi atrocities by Ilya Ehrenburg and Vasily Grossman. In the first chapter of the book entitled "Introduction: The Crimes of Communism", Stéphane Courtois states that