Walt Larimore and Mike Yorkey have written a masterful retelling of a heroic life. “At First Light: A True World War II Story of a Hero, His Bravery, and an Amazing Horse” is a full story. I mean this is in the complimentary sense that it is a story of a courageous life such as one would typically find in fictionalized heroes. Indeed, there were several times I had to reconfirm whether the story was fictionalized, or cleverly and overly embellished. But the authors of the book set the record in stone at the end with a hefty collection of news clippings, photographs, and letters, along with a thorough bibliography….