For true baseball fans, football's violent chaos is too complicated for the reliable equations that the diamond sport yields so readily. Batting averages, fielding averages, slugging averages, on-base-percentages provide reassuring measures of worth. In the past fifteen years, Baseball Prospectus has been developing even more precise statistics to evaluate our favorite players, teams, and even time-distant eras. This standalone sequel to their hit Baseball Between the Numbers takes fans deeper into the strange human calculus that keeps us glued to the screen. Editor's recommendation.