Don was a baseball enthusiast--his twin sister Donna ducked whenever the ball was pitched her way. When Don became sick on the day of the big game, Donna masqueraded as her brother, almost lost the game, but accidentally hit the last inning decisive home run. The baseball tie-up is good bait for the sport enthusiast/reluctant reader, although boys may lose interest in Donna's success. The cartoon illustrations are carelessly drawn but do show a lot of action and give a clear idea of how the game is played. In the final standings, this rates below Here Comes the Strikeout (1965), higher than the Kessler book reviewed above.