
This sci-fi book by the author Steve Alten is all about it. Why did the Mayans turn to cannibalism and kill their own towards the end? Why were those huge pyramids built? Let alone building it, how were the rocks lifted several feet above the ground when some of them weighed in excess of 20 tonnes?
What is the purpose of those lines (The Astronaut, The humming bird, The monkey) drawn on the Nazca desert? Why are these lines and structures built pointing precisely to the Orion belt? Are they telling us something? Are they warning the human race to prepare for the worst?
Read this book and if you like read it's sequel, Resurrection.
Both of these books are fiction neatly woven with scientifically accurate facts.