I bought this because I didn't know how to play with my child(^^) I think it will give me some hints on how to play with my child in everyday life. There is a crease on the cover. (See photos 4 and 5) There are no writings. ◎ This is a used item, and it has been stored at home by a private individual, so please understand this before purchasing. ◎ Please read the self-introduction section before proceeding with the purchase!