An astonishing investigation into the start of the Russo-Ukrainian war - from the corridors of the Kremlin to the trenches of Mariupol. The Russo-Ukrainian War is the most serious geopolitical crisis since the Second World War - and yet at the heart of the conflict is a mystery. Vladimir Putin apparently lurched from a calculating, subtle master of opportunity to a reckless gambler, putting his regime - and Russia itself - at risk of destruction. Why? Shortlisted for the Parliamentary Book Awards.