Book excerpt: In 2003, as an older father, O'Brien resolved to give his young sons what he wished his own father had given to him: a few scraps of paper signed "Love, Dad." Maybe a word of advice. Maybe a sentence or two about some long-ago Christmas Eve. Maybe some scattered glimpses of their aging father, a man they might never really know. In this book, O'Brien moves from soccer games to warfare to risqué lullabies, from alcoholism to magic shows to history lessons to bittersweet bedtime stories, but always returning to a father's soul-saving love for his sons. -- adapted from jacket