This is a set of four books: Modern Japanese, Classical Japanese, English, and Math for Humanities students. Upon inspection, there were no writings in the problem sections. There are check marks next to problem numbers, creases, and stains (see photo 3, on the bottom of the English book), and signs of use. Please note that these books have been stored at home and have been inspected by an amateur, so there may be oversights. Please refrain from purchasing if you are overly concerned about condition. I am considering selling the books individually, although the price per book will be higher to cover shipping costs. Shipping will take 4-7 days, but I will ship as quickly as possible. Please feel free to ask any questions in the comments. Thank you very much (__)