Members of the Home Guard with their racing pigeons at Blackburn in Lancashire, during World War II, 31st July 1940. The pigeons are being trained as messengers. (Photo by Fox Photos/Hulton Archive/Getty Images)
Members of the Home Guard with their racing pigeons at Blackburn in Lancashire, during World War II, 31st July 1940. The pigeons are being trained as messengers. (Photo by Fox Photos/Hulton Archive/GeShow more

Review: Sec­ret Pigeon Service is a riveting and revelatory book