The Doctor's Guide to Baby Sleep: The Morita Mariko Method By: Mariko Morita Supervised by: Kyoko Hoshino Publisher: Diamond Inc. Price: 1,300 yen This book summarizes baby sleep, going beyond individual differences. The contents are in good condition. I am selling this due to moving. Will ship via Yu-Packet Post. I will not negotiate on the price. I will delete the listing if it sells on another site. Instant purchase is welcome. I do not accept any complaints, returns, or exchanges regarding the product. Please ask any questions before purchasing.