To paraphrase the first line of J.M. Barrie's Peter Pan: all presidents, except one, grow up. Theodore Roosevelt started life as the sickly son of a wealthy New York family, and he ended it as an acclaimed author, a US President, a Nobel Peace Prize recipient, and one of four faces to be carved onto Mount Rushmore. Yet, through all of his achievements, he always retained the same youthful pluck he'd had when he was the little boy known as "Teedie." Both his supports and his detractors attest that Theodore Roosevelt redefined the office of the American President like few others have ever done. Tony Rydberg and Ryan Rasmussen trace the origins of this remarkable figure in world history and gauge his lasting impact on the American story.