He wrote two memoirs, Specially Employed (1952) and They Fought Alone (1958), but they are not to be relied upon, and he was interviewed for the 1969 documentary The Sorrow and the Pity.
The reasons include antisemitism, anglophobia, fear of Bolsheviks and Soviet invasion, the desire for power, and simple caution.
Johnny Sorrow | In Joy and Sorrow | Town Without Pity | 'Tis Pity She's a Whore | The Sorrow | Tears of Sorrow | Man of Constant Sorrow | The Sorrow and the Pity | Streets of Sorrow/Birmingham Six | Snow Borne Sorrow | King of Sorrow | Injustice Society#Johnny Sorrow's team | Hope & Sorrow | Don't Go Down to Sorrow | Castlevania: Aria of Sorrow |