#1 in pregnancy and childbirth sales for 20 consecutive years
Total cumulative sales: 2.2 million copies

『Encyclopedia of Pregnancy, Childbirth, and Childcare』 is the undisputed number one book in the field of pregnancy and childbirth, known as the nation's yellow book.
Since its first publication in 2006, it has sold over 100,000 copies annually, achieving cumulative sales of 2.2 million copies.
It contains essential information from the beginning of pregnancy through the entire process, and updates the support system as it changes each year, establishing itself as a solid first must-read for expectant parents.