Founded in 1862, its prime interest focuses on paranormal phenomena such as ghosts and hauntings, but the club also covers other related subjects such as UFOs, crop circles and the Loch Ness Monster. The club has been mentioned in numerous books, the most notable being "This Haunted Isle" (1984), "No Common Task" (1983), "Nights in Haunted Houses" (1994) and "The Ghosthunters Almanac" (1993) by Peter Underwood, "Some Unseen Power" (1985) by Philip Paul, and "The Encyclopedia of Ghosts and Spirits" (1992) by Rosemary Ellen Guiley.

Founded in 1851 by a small group of gentlemen, the club has since grown and developed over the years. Mr Peter Underwood is the current life president of the society. The Ghost Club Society is devoted to the serious and impartial investigation, study and discussion of subjects not yet fully understood or accepted by science.

Castle of Spirits is the best source of ghost stories in Australia, with 1000's to choose from. Recently, it is also the home of COSPER (Castle Of Spirits Paranormal & Entity Research), a group Brisbane Ghost Hunters works closely with. COSPER is a dedicated group who do not have any preconceived or established beliefs about the paranormal. Like most ghost groups around the world today, they pride themselves on learning and gathering knowledge as they explore and investigate reported hauntings.