This product is a set of two bunkobon (paperback books) from Chukei Publishing: "Zatsugaku Kagaku Dokuhon: Mi no Mawari no Mono no Gijutsu" (Miscellaneous Knowledge Science Reader: The Technology of Things Around Us) "Zatsugaku Kagaku Dokuhon: Mi no Mawari no Mono no Gijutsu Vol. 2" (Miscellaneous Knowledge Science Reader: The Technology of Things Around Us Vol. 2) This book explains simple questions about the things we often use in our daily lives, from home appliances to high-tech devices and everyday household items, with illustrations. You'll understand why "things = the crystallization of science and technology." It's a fulfilling book that can be enjoyed by adults and children alike. This product is a used item, so there may be some scratches due to aging, but it is generally clean. There are no tears or scribbles on the pages. Please purchase only if you understand that this is a used item. #Yoshiyuki Wakui #Yoshiyuki_Wakui #Sadamitsu Wakui #Sadamitsu_Wakui #book #Engineering/Industry/General Miscellaneous Knowledge Mechanism of Things Culture/Education Science and Technology High-tech Devices