This is a set of volumes 1-3 of the novel "3-nen Z-gumi Gin-pachi-sensei." I read them a few times 10 years ago and have been storing them in a closet at home. Volume 1 has some stains on the back cover (please see the third image). The content was really interesting, so I recommend it to Gintama fans! Please refrain from purchasing if you are overly concerned about the condition, as I have stored these at home.