Thank you for viewing. Gakken Perfect Course Problem Collection: Junior High School Science & Social Studies With answer key and explanations. Editor: Gakken Plus 【Condition】 Due to long-term storage at home, the cover has minor scratches. Since it was not used after purchase, there are no folds or markings, and the inside is like new. I am selling it to organize my belongings. It has been stored in a dark place.