Yukito Ayatsuji (born 1960) is a Japanese writer of mystery and horror novels and one of the founding members of the Honkaku Mystery Writers Club of Japan, dedicated to the writing of fair-play mysteries inspired by the Golden Age Greats. He started writing as a member of the Kyoto University Mystery Club, which has nurtured many of Japan's greatest crime writers. The Decagon House Murders, The Mill House Murders and The Labyrinth House Murders are also available from Pushkin Vertigo.

Ho-Ling Wong is a translator currently living in Tokyo. He is also both a member of the Honkaku Mystery Writers Club of Japan and former member of the Kyoto University Mystery Club. He did not commit any murders on Mystery Club excursions.