This is a set of two books, 2022 and 2019. Individual sales are not possible. *Please refrain from price negotiations. (We will decline even if you leave a comment)* 【2022】 The seller personally checked the book and confirmed that there are no highlighter marks, underlines, or writing. (Please forgive any oversight) 【2019】 There was writing on some pages in light pencil, but the seller has erased it all cleanly. I don't think it will significantly affect the exercises. Also, there are highlighter marks on a few pages, but I don't think this will particularly affect the exercises either. There is no writing in ballpoint pen.