This is a science study guide for second-year junior high school students, with easy-to-understand explanations. - Title: Understanding Middle School Science 2nd Year, One Step at a Time - Authors: Atsushi Ishida, Hiroshi Kinoshita, Yoko Sato - Publisher: Gakken - Contents: Science study guide for second-year junior high school students - ISBN: 9784053032183 For studying this winter break... It hasn't been used, so there are no markings, but there are some stains and creases on the cover. Thank you for your understanding.