Picture book series featuring construction machinery. 4 books - Title: Bulldozers and Friends - Author: Tadataka Yamamoto - Series: Kodomo no Tomo Shonen-ban (Children's Friend Junior Edition) - Volumes: 3, 6, 11, 12 Price: 400 yen per book - Content: Picture books about construction machinery. All images are provided, please check them. One book has a name written in it, which has been blacked out. Thank you for looking.