Codeword: Direktor; the Story of the Red Orchestra

"Its
efficient prewar espionage system depleted by Stalinist purges, the
Soviet Union undertook a desperate, crash training program to replace
executed agents as Hitler's Reich goose-stepped relentlessly toward war.
Under the brilliant leadership of a professional revolutionary, Leopold
Trepper (The Grand Chef), a group of ill-prepared recruits was molded
into an extensive and chillingly effective spy network."