He led a full life as THE KGB General then defected to USA but didnt tell the americans. His time covered the full Stalin era. Wanna know about Krogers, Rosenbergs, Franco, Philby etc, well Orlov was there. Extremely interesting book and gives detail not found elsewhere. He even tried to warn Trotsky. It was in a book about Trotsky that I came upon Orlov's name.