In this book, David A. Fisher combines methods including Geographic Information Systems (GIS), GPS, computerised three-dimensional modelling and astronomical formulae in order to reconstruct the world as it was seen by the builders of Scottish megalithic sites within the region of Argyll and Mull. These sites have no associated archaeological artifacts that allow us to determine the dates of their construction. Through the employment of these methods, however, the sites' astronomical orientations may be visualised and used to predict a feasible date range for their construction more accurately than has been possible in past research. New discoveries made via computer simulations/animations showing 3D recreations of the sites through the course of a single year, or over millennia (available as a digital download accompanying this book), show that the sites are 800 to 1000 years older than previously stated, and new hypotheses as to how the sites were employed are also suggested. For the first time, the author offers the definitive conclusion that stars formed an important part of megalithic history.