Practice Being Happy * (Korean title: 행복해지는 연습을 해요) by Jeon Seunghwan has been read or recommended by 2 Korean celebrities, including Jinyoung (GOT7), Hyerim.
Book titles and author names marked with an asterisk (*) are machine-translated from Korean. No official English edition was confirmed for them, so read them as approximations of the Korean original shown next to them.