Publisher's Synopsis
The key to finding them lies in an ancient secret, a secret that men throughout history have sought to unveil.
When it comes to ancient civilizations, they recall, as a rule, the Sumerians, Egyptians, Incas or Aztecs. But scientists believe that there was other, not so famous, but no less great civilization. In this book we will try to lift the veil of secrets that are associated with them.
