A children's book in manga format that teaches how pumps work in an enjoyable way. - Title: The Secret of Pumps - Series: Gakken Manga de Yoku Wakaru Series 76 - ISBN Code: 534 - Author: Hitoshi Ohno - Illustrations: YHB Gagyo Dan Thank you for viewing. This book was received at an event and is in good condition, having been read only once. We look forward to your purchase if you understand that this is a book read by a child.