The Cosmic Code: Book VI of the Earth Chronicles by Zecharia Sitchin

Many thousands of years ago, a race of extraordinary beings guided the evolution of life on Earth -- determining the existence and nature of mankind as we know it today. All powerful, all knowing, the proof of their genius is apparent in the mysterious monoliths at Stonehenge, and in a strange but highly significant sturcture of concentric stone circles in Israel's Golan Heights -- both requiring sophisticated astronomical knowledge. Teaching man to look to the heavens, they bequeathed to us the Cosmic Code.