A set of two books from the "Fascinating Series": "The Autonomic Nervous System" and "Sports Explained Through Physics." The physics book has some stains and scratches. It doesn't affect reading, but please refrain from purchasing if you are concerned. A set of two books that explain sports from the perspectives of the autonomic nervous system and physics. - Book Title: The Autonomic Nervous System - Book Title: Sports Explained Through Physics - Author: Satoshi Hayashi - Author: Osamu Natsume - Publisher: Seibundo Shinkosha - Publisher: Seibundo Shinkosha Thank you for looking.