• Origin: Originally published from 1970 to 1975 by BPC Publishing and Marshall Cavendish as a 112-issue weekly magazine before being compiled into hardcovers.
• Length: 24 volumes containing 3,333 pages, featuring over 1,000 articles and 5,000 retro illustrations, photographs, and historical artwork.
• Contributors: Written and compiled by over 200 academics, historians, and specialists (including Mircea Eliade and Glyn Daniel).
• Scope: Covers occultism, mythology, witchcraft, folklore, the paranormal, demonology, astrology, forgotten civilizations, and religious history. Volume 24 includes a comprehensive master index for the entire set.
• Market Value: Complete vintage 1970 sets typically sell between $376 and $659 USD depending on condition and wear.