By Calder Walton
By Ronald Radosh, Sergei Kostin, Alexander Feklisov
By Michael Widlanski
By Ben Macintyre
By Mark Urban
By Dominic Green
By Christopher Andrew, Vasili Mitrokhin
By Piers Paul Read
By Christopher Andrew, Oleg Gordievsky
By Park Honan (Emeritus Professor, School of English, University of Leeds)
By Bamford, James