A Game of Birds and Wolves. The Secret Game that Revolutionised the War

1941. The Battle of the Atlantic is a disaster. Thousands of supply ships ferrying vital food and fuel from North America to Britain are being torpedoed by German U-boats. Britain is only weeks away from starvation — and with that, crushing defeat.In the first week of 1942 a group of unlikely heroes — a retired naval captain and a clutch of brilliant young women — gather to form a secret strategy unit. On the top floor of a bomb-bruised HQ in Liverpool, the Western Approaches Tactical Unit spend