This is a set of 7 books: Math, English, Japanese, Science, and the answer/explanation keys. All of the mock exam contents have pencil markings. The cover of the answer/explanation key has red ballpoint pen markings. The answer/explanation keys for Math and Science have noticeable wrinkles, and the cover in the third photo has a tear. Please understand that these are used items. Thank you for your consideration. They will be shipped in a waterproof bag. I am open to price negotiations, so please feel free to comment.