It is Zecharia but he maintains that the metal working facilities and massive structures in Peru were created by extra-terrestrials who came down from the 12th Planet which has a long elliptical orbit around the sun. That argument is in Lost Realms and I can't say much about it but can definitely say that wierd as such a theory is the ruins in Latin American are even wierder.
Look on the net for references to Sitkin and his books.