There are marks on the back cover. This is a parenting book focusing on how to interact with adolescents. It is co-authored by Dr. Keiko Kimura, a Doctor of Medicine, and Aiko Takahashi, Director of the Home Education Research Institute. It explains how to deal with adolescents and the characteristics of parents. It will be shipped via Yu-Packet Post with simple packaging for water damage prevention only. Please note that we cannot accept returns or exchanges after purchase, even if something happens during shipping.