Old Enough provides a lighthearted yet substantive account of the history of the Twenty-Sixth Amendment and the subsequent participation of young people in the electorate. The book breaks the norms commonly found in non-fiction by thoughtfully addressing a significant topic in a well-researched but accessible way. Appealing to both reluctant and avid readers alike, the intended audience spans ninth graders to adults. The book highlights primary sources and includes drawings, historical images, a timeline, notes, and bibliography.