This series introduces the major North American professional sports leagues, exploring each league's history and how it has changed during its history. The books detail the great players and teams of yesterday and today, iconic moments that defined these sports, and the arenas, fields, and stadiums where fans come to be entertained and awed by athletic excellence. Aligned to Common Core Standards and correlated to state standards. Essential Library is an imprint of Abdo Publishing, a division of ABDO.