Product Description: Thank you for viewing. For those who want to take their pitching skills to the next level, here's a set of two popular books that teach both the theory and practice of pitching. This is highly recommended for students starting their season and those aiming to be the ace in their amateur baseball leagues. [Set Contents] 1. "The Secrets of Pitching Technique" by Minoru Oori • This book condenses the treasured improvement methods revealed by high school baseball coaches. • You can learn how to throw breaking balls and strategic thinking to suppress batters. 2. "Fastest Improvement Pitching" by Seibido Publishing • This book is rich with specific training menus for stable form, increased ball speed, and improved control. • With many photos, it's easy to visually understand how to use your body correctly. [Condition of the Product] • Both books have no noticeable tears or writing and are perfectly readable. • [Example: There are slight scratches on the cover, but overall, they are in good condition.] • Please purchase only if you understand that these are used items.