The home run is indeed baseball's ultimate weapon. It can change a game in a heartbeat, making a tight game into a blowout or a seemingly easy win into a nail-biter. Homers are majestic, powerful, and awe inspiring. And sluggers are the sport's biggest stars, from the days of Babe Ruth through Barry Bonds.David Vincent, called "The Sultan of Swat Stats" by ESPN, delves into the long history of the home run with great detail and color. He starts when the rules of the game were highly unstable and sometimes the definition of a home run could change in a park from year to year; follows through...