Kim Jae-hee is an award-winning Korean mystery novelist and screenwriter whose work ranges from historical faction mysteries to contemporary detective series. After studying at Yonsei University and completing graduate work in film scenario writing, she worked in screenwriting before becoming a novelist. Her Gyeongseong Detective Yi Sang series won the 2012 Korean Mystery Literature Award, and her fiction has been translated and presented internationally. She is particularly skilled at building recurring detective characters whose personal relationships evolve alongside individual cases. Bookstore Detective Yoo Dong-in 2: Returns extends that strength through realistic modern crimes, witty dialogue, and the continuing chemistry between Dong-in and Aram.