This is a set of four books. I flipped through them overall and didn't see any writing, but I apologize if I missed anything. [20 Years of Osaka University English, 10th Edition] There are some scratches, but it's in good condition and doesn't show much use. [20 Years of Osaka University Science Mathematics, 10th Edition] There are scratches, corner wear, and blackening, and about 5 pages are creased and folded together (please refer to the images). [20 Years of Osaka University Chemistry, 7th Edition] It's in clean condition and unused. [20 Years of Osaka University Physics, 9th Edition] The cover has scratches and corner wear, but the inside is in clean condition.