I received this a while ago and have been storing it after opening. As you can see in the third photo, there are creases and some scratches/stains on the cover, but the inside is clean. I haven't had time due to work and hobbies, and I stopped studying after October, so I'm selling it to someone who needs it. You can study for one month using the separately sold audio download, which was broadcast from September 29th to November 1st. I will ship it on the day of purchase or at the latest, the next day.