Frontiers of the Unknown by Andrew Mackenzie
Frontiers of the Unknown by Andrew Mackenzie (Popular Library, New York / 1968)
'Extraordinary case histories of men and women who have entered the psychic universe'! Precognition etc. Good condition paperback with tight binding and just a minor crease down spine suggesting careful reading. Crease to bottom left-hand corner of back cover (as seen in pic) and other lighter signs of shelf-wear commensurate with age.