"This is the best baseball book I’ve read in years. Swing Kings is a love letter to small people with big ideas." — Sam Walker, author of The Captain ClassFrom the Wall Street Journal’s national baseball writer, the captivating story of the home run boom, following a group of players who rose from obscurity to stardom and the rogue swing coaches who helped them usher the game into a new age. We are in a historic era for the home run. The 2019 season saw the most homers ever,