Describing Lethbridge as "one of the most compelling" figures in 20th-century British archaeology, Finneran believed that at the start of the 21st century, Lethbridge was best known for his advocacy of dowsing. As such, Finneran asserted that Lethbridge's "true legacy" lay outside of "conventional archaeology", and could instead be located within the Earth mysteries movement. Lethbridge's work continued to attract interest from parapsychologists after his death. The author M.B. Devot drew heavily on Ghost and Ghoul in his "Spirits of Field and Hearth". In 1978, the author Colin Wilson devoted part one of his book "Mysteries" to a discussion of Lethbridge's ideas. In 2003, a group of admirers of his work calling themselves "The Sons of T.C. Lethbridge" (Doggen Foster, Kevlar Bales and Welbourn Tekh), with the aid of Wilson and Julian Cope, released "A Giant: The Definitive T.C. Lethbridge", a set comprising a booklet and two CDs containing music accompanying discussions of Lethbridge's work.