Includes a separate volume. There are several pen markings (as shown in the photo) in the introductory explanation section, the problem numbers, the problem statements, and the explanations of the first section. Please check the photos. There are also some corner scuffs on the cover. I don't think it will affect the answers, but please refrain from purchasing if you are concerned. I used to be bad at the reading section, but after doing this, I consistently scored over 900. Highly recommended! "Deru 1000" "Derusen" Thank you for looking.