This is a set of 4 books: Basic Mathematics I+A and II+B, ideal as study guides. - Title: Basic Mathematics I+A - Title: Basic Mathematics II+B - Author: Yoshisaku Nakamura - Publisher: Kenkyusha Publishing - Number of books: Set of 4 I checked the contents for about a minute and it seems there are no markings. However, there might be oversight, and there might be some scribbles or spiral binding issues. Please refrain from purchasing if you are sensitive to these issues or seek perfection. (Some items may have minor scribbles.) Please judge the condition of the product based on the photos and purchase with your understanding. If there are any significant markings that would hinder your studies, please contact me within 2 days of arrival without confirming receipt, and I will cover the return shipping costs. Please purchase only if you understand that these are used items. I am also selling multiple other study guides. I will offer a 100 yen discount for combined purchases, so please feel free to inquire. (Combined shipping may not be possible depending on shipping costs.) Thank you for viewing.