Arthur Machen (Arthur Llewelyn Jones), a Welsh author of supernatural, fantasy, and horror fiction, was born on March 3, 1863. He grew up in Caerleon, Monmouthshire, and attended boarding school at Hereford Cathedral School. He moved to London in 1881 and worked as a journalist, children's tutor, and publisher's clerk, finding time to write at night. By 1894, Machen had his first major success. The Great God Pan was published by John Lane, and despite widespread criticism for its sexual and horrific content, it sold well and went into a second edition. In the 1920s Machen's work became immensely popular in the United States, but Machen experienced increasing poverty; he was saved in 1931 by receiving a Civil List pension from the British government. Arthur Machen died on March 30, 1947.

S. T. Joshi (b. 1958) is the author of such critical studies as The Modern Weird Tale (2001). His exhaustive biography, H. P. Lovecraft: A Life (1996), won the British Fantasy Award and the Bram Stoker Award from the Horror Writers Association.

Guillermo del Toro (b. 1964) is a Mexican director, producer, screenwriter, novelist and designer. He is most recognized for his Academy Award-winning films, Pan's Labyrinth and the Hellboy film franchise. He is an avid fan of weird fiction and fantasy writing and the genres heavily inspire his movies.