This product is a lot of Beckett books and non-graded cards featuring famous baseball players Don Mattingly, George Brett, Ozzie Smith, and Darren Daulton. The books are vintage paperback price guides published by Beckett Media in 1990, focusing on the sports trading card industry. The collection includes players from teams like the New York Yankees, Philadelphia Phillies, Kansas City Royals, and St. Louis Cardinals, making it a valuable resource for baseball card collectors looking to learn more about the history and value of these iconic players' cards.