The author has unraveled the fascinating history of Astronomy by the Maya before the arrival of Columbus, and it does a decent job. The focus is on interpreting the intricate, highly symbolic, artifacts left behind by them, as well as by the Aztec and the Inca. In addition, those of some North and South American tribes, especially when their symbols are related to ancient astronomy. The writer covers a breadth of scientific, astronomical and historical information making bold, but often plausible, interpretations. The author may take you places you've never even imagined.