A set of two books, one for teenagers and one for parents of teenagers. The text size and book size are the same as a paperback, and the amount of text is also light, like a paperback, so I think it's aimed at teenagers in their late teens or early teens, or parents of teenagers (subjective). 17 Things to Do in Your Teens By Ken Honda Daiwa Bunko Price: 571 yen Coaching the Hearts of Teenagers By Yuko Sugawara PHP Bunko Price: 552 yen Note: There is a fold and stain on the back cover. There are stains, scratches, and imprints to the extent shown in the photos. I checked the inside briefly, and compared to other listings, there is a feeling of use, but there are no unreadable parts. Also, these are items that have been stored at home for a long time, so there may be dust, etc. Please consider only if you understand this. Please note that it will be sent by Yu-Packet Post Mini with simple packaging (may be changed to Nekopos).