Gessner embarks on a leisurely but consistently interesting journey that follows, more or less, T.R.’s loop around the West. Along the way, we get engaging local color (a gathering of Roosevelt impersonators in North Dakota) and a solid sense of the man: energetic, inquisitive, immune to self-doubt and an ardent lover of nature. Gessner celebrates Roosevelt’s conservation achievements: five national parks, 18 national monuments and the U.S. Forest Service.