L. Douglas Keeney was at the National Archives researching his book Air War Europe when he stumbled across a photograph of a soldier on the front lines with a puppy. This led him to look for more like it, and he eventually came up with hundreds (plus a few of mascot birds, monkeys, and cats). Many of them are nearly irresistible, including one of a ninepound boxer named Max who jumped from a plane five times to qualify as a full-fledged paratrooper with the 505th Parachute Infantry. Keeney has gathered all the photographs he found in Buddies: Men, Dogs, and World War II (MBI Publishing, 156 pages, $24.95).