This work investigates the clandestine operations of the French Resistance network known as the Réseau Alliance during the German occupation of France in World War II. Richard J. Collier utilizes extensive interviews with surviving members of the network to reconstruct the high-stakes intelligence gathering that occurred under the constant threat of discovery. The text argues that the success of the Allied liberation efforts relied heavily on the granular, dangerous work of these civilian informants who risked execution to provide critical data on German military movements.

This account is regarded as a significant contribution to the historiography of the French Resistance, noted for its reliance on primary source interviews that capture the human element of wartime espionage. The narrative provides a dense, detailed look at the mechanics of underground intelligence, serving as a valuable resource for those interested in the operational realities of the Second World War.