Obunsha Mathematics IA IIB Standard Problem Collection Written by Masahisa Aso and Takashi Kameda University Entrance Exam Preparation Reference Book Thank you for looking. The usage period was short, and it was stored in a dark place, so the condition is generally good. I checked for writing and did not find any, but I apologize if I missed anything. Immediate purchase is possible. There are no pets or smokers in the household.