Yojin Series Kanji and Words Fourth Grade, both volumes The covers show signs of wear, such as scuffing, opening marks, and creases. Upon checking for writing inside, I found and erased pencil markings (diagonal lines) in a few places. Otherwise, there appears to be no writing. Please forgive any oversight. Not sold separately. For those who understand the above condition. How about it for home study or those who want to try the Yojin Series?