Answer: This is a listing for the explanation book only. I have checked for writing, etc., and found none, but I apologize if I missed anything. There is a slight crease on the back cover (please check the second photo). Please only purchase if you understand that this is a used item. Due to the thickness, it will be shipped with simple packaging. #changetheworld #advanbed #iissunashoten #advancedschoolreferencebook