A new story in the bestselling cops-and-wizards series Rivers Of London, from chart-topping author Ben Aaronovitch! Uncover the secret World War II history of Peter Grant's fan-favorite mentor, the mysterious Nightingale. When a serial killer with strange powers arrives on the streets of London, an old soldier remembers the man who mastered the occult at the height of World War II!

Collects Rivers of London: Action At A Distance #1-4