When President Dwight Eisenhower left Washington, D.C., at the end of his second term, he retired to a farm in historic Gettysburg, Pennsylvania, that he had bought a decade earlier. Living on the farm with the former president and his wife, Mamie, were his son, daughter-in-law, and four grandchildren, the oldest of whom, David, was just entering his teens. In this engaging and fascinating memoir, David Eisenhower--whose previous book about his grandfather,...