It's Kabbalah (or Cabala), not cabal, and it is a broad term
         for a complex school of mystical/esoteric Jewish philosophy
         that dates back to the Middle Ages.  I suggest that your
         patron contactthese folks for a copy of their book catalogue.
         They have a good selection of inexpensive paperbacks on such
         topics.
 
                    Jewish Publication Society
                    1930 Chestnut Street
                    Philadelphia, PA 19103
 
                    Toll free: 800-234-3151
 
         (Can you call toll-free from Guam?)
 
         Good luck.
 
         Stephen Greenberg
         History of Medicine Division
         National Library of Medicine