I was born 20 years after Walter Thompson started flying Lancasters and went to law school with his son, David. Mr. Thompson's story is engaging, technical and meticulous with a rare touch of humanity. Thompson's writing includes excellent descriptions of Pathfinder squadron guidance and sighting systems, and comparisons of night and day bombing, without any pretensions or arrogance. He devotes some time to the human toll of war and the collateral damage common with early aiming technology and free-falling explosives without being preachy. A thoughtful, sometimes entertaining, and educational read. Highly recommended.