Ancient Voyager Book 3 Secret of Our World

This is the continuing story of four students who have entered the workaday world and find themselves unhappy with what they are doing and where that path is leading.  Once again they seek the help of Tenzin the Tibetan and, in the process, learn the terrifying truth about timeships.   Together they take a journey which reveals far more about themselves and the history of earth than they had suspected or been taught.
They are also about to learn the secret of this world.