D'Four, Atlas

Atlas D'four (not his real name) has studied the Second World War for over 60 years. His books deal mainly with 'secrets' and 'lies' relating to that war and lays 'bare' those truths many of which are still held 'secret' in the combatants archives. How does he know? When is a secret not a secret? When the truths are known by more than one. You be the judge.