I think it's relatively clean, but please consider it a used book as it has been stored at home. I haven't read the entire book, but I found it very helpful, focusing on key points. A practical book explaining training methods for throwing a 140km/h fastball. Baseball training Medicine ball Plyo ball - Title: Innovative Pitching Performance - Author: Makoto Takashima - Publisher: Nihon Bungeisha - Price: Regular price 1980 yen - Contents: Training methods for throwing a 140km/h fastball - Profile: The author's profile, who has extensive experience as a trainer Pitching Thank you for viewing.