I would call Kevin Lane's The Inca a broad overview that is ideal for dipping your toe into the sea of information we have on the Incan Empire.
The Popol Vuh Review
In my literary tour of the ancient world, I've visited Iceland, Europe, the Middle East, India, and the Mediterranean, and I have plans to visit China (that will be next week's review, sort of). The perhaps obvious gaping holes in this journey are Africa and the Americas, which simply do not have the same ancient literary traditions as the other locations I've mentioned. I could be reading ancient Greek literature for the rest of the year at least, but even finding a single title authentic to the Americas (as opposed to a history of the region) was a challenge. Eventually, I stumbled across something called the Popol Vuh.
IGC Publishing 