Lee Jong-kwan is the editor-in-chief of a criminal investigation magazine. He has expanded the realm of forensic investigation to include `fine evidence`, `blood stain pattern analysis`, and `profiling`. In 2019, he published his mystery thriller novel Hyeonjanggeomjeung (현장검증 Spot Investigation)

Je Indo began her career in movie magazines and then worked as a lifestyle magazine editor before becoming a publicist. She received a MacBook as a birthday gift, which sparked her earnest foray into writing. She has since published five web novels, including Daeriin (The Agent). Jugeun Nampyeoni Dorawatda (My Dead Husband Has Returned) and Eonadeo: Tto Dareun Neo (Another You) are currently in the process of cinematic adaptation. She is exploring various genres with a foundation in mystery.

He is a South Korean web novelist whose works include 'Solo Leveling' and I Saw the King.

"Seoul, Catacombs" is her first novel.