Career
Grigsby received a Bachelor"s degree in Prehistoric European Archeology and History and a Master"s degree in Celtic Studies. He made contributions to (Graham Hancock)"s Heaven"s Mirror and the television series based upon the book, Quest for the Lost Civilization. He is co-author of The Mars Mystery (with Graham Hancock and Robert Bauval).
His book Warriors of the Wasteland (Watkins, 2002) examined the Medieval legends of the Grail in light of Indo-European, especially Celtic, myth.