The Soul Guardians (Korean title: 퇴마록) by Lee Woo-hyuk has been read or recommended by 3 Korean celebrities, including Yoon Shi-yoon, Lee Jun-hyuk, Joo Ji hoon. Below, each entry shows where they mentioned it and what they said.
A PC-era novel series Yoon Shi-yoon bought as a full set in Busan's used-book alley; childhood favorites get the whole set. (Source: Allure Korea)
Mentioned as a recent purchase. (Source: fan-compiled Notion page)