It covers traveling conditions and other factors of the differing eras, and includes a detailed recap of Ruth's so-called "hidden career" - his time playing exhibition games.

On pages 300–339, the author lists every home run hit by Ruth during his career, along with estimated distances that the ball flew in each case.

According to Jenkinson's estimates, a sizable number of Ruth's homers exceeded 500 feet (the official record is Mickey Mantle's 565-foot home run at Griffith Stadium in 1953, off Chuck Stobbs, although other long home runs, such as Dave Nicholson's 1964 573-foot blast onto or over the left-field roof of Comiskey Park, occurred), and many exceeded 450.

From that long list, as well as discussion in other parts of the book, some of Ruth's longest home runs at each ballpark can be summarized.

[3] He resides in Willow Grove, Pennsylvania, and is a member of the Society for American Baseball Research (SABR).