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
Peter Wright MI5 management shortly after his appointment as prime minister in 1964 by James Jesus Angleton, Deputy Director of Operations for Counterintelligence at the CIA. The investigation into Wilson's background by MI5, however, failed to produce any conclusive evidence. When Wright retired in 1976, Harold Wilson was again prime minister. Dame Stella Rimington, MI5 Director General from 1992 to 1996, who was in MI5 while Peter Wright was still working there, wrote in 2001 that she believed that in a Panorama programme in 1988, Peter Wright had retracted his allegation made in his book about the MI5 group of thirty officers