Inside...?"A cassette book"Hold on a minute.wackHurry up and let me use it.I sure it was around here somewhere...I'm telling you its not a normal book.This is...This is a "walkman"wackI don't really understand but it looks interesting.I see-then
What is a cassette tape?What's strange about this normal-looking book?Whatever. Hurry up and take a look!The included "cassette tape" allows you to enjoy the book visually and auditorily.With this tool,"You can listen to the cassette tape anywhere."