Amy Gutierrez ("Amy G" to San Francisco Giants fans) tells the inspiring story of older sister Marty, who teaches the game (and love) of baseball to her younger brother Mikey. Marty has always loved baseball and is known as "Smarty Marty" to her friends at school because she knows more about baseball than most grown-up baseball fans. However, her younger brother, Mikey, couldn't be bothered and just doesn't get it...UNTIL, Marty and Mikey attend a...