The book is "Dalko: The Untold Story of Baseball's Fastest Pitcher." Steve Dalkowski (1939-2020) is widely regarded as the fastest pitcher in history - but unfortunately, he lacked control of his fastball and he never went beyond the minor leagues. His is a fascinating story of unrealized potential- and of how his story might have played out very differently had he come along at a different time. Dalkowski died earlier this year from COVID-19. Brian Vikander, one of three co-authors of "Dalko," is a nationally-recognized pitching coach.