The book identified Baron Rothschild as an important member of the Cambridge Spy Ring. Modin published his book, Mes Camarades de Cambridge, in France in 1994. Please see the talk page for more information.

This article or section appears to contradict itself. According to a review of Modin's book, 'the center concluded that all five must really be British intelligence officers trying to penetrate the KGB'. The KGB had difficulty believing that the men would have access to top secret documents they were particularly suspicious of Philby, wondering how he could have become an agent given his Communist past. In his 1994 book, Modin (their controller, starting in 1948) revealed that in the early days Moscow did not really trust the Cambridge Five, British agents who were passing secret information to the Soviet Union. But in the end I suspect that Philby made a mockery of everyone, particularly ourselves. His great achievement in espionage was his life's work, and it fully occupied him until the day he died. Neither the British, nor the women he lived with, nor ourselves ever managed to pierce the armour of mystery that clad him. Modin said of Kim Philby in February 1994: Modin's predecessors in control of the damaging Cambridge spy ring were executed during Stalin's Great Purge. In 1951, Modin arranged the defections of Maclean and Guy Burgess. Yuri Ivanovich Modin (8 November 1922 in Suzdal – 2007 in Moscow ) was the KGB controller for the ' Cambridge Five' from 1948 to 1951, during which Donald Duart Maclean was said to have passed atomic secrets to the Soviets.

My Five Cambridge Friends by Yuri Modin