The Armies of the Aztec and Inca Empires, Other Native Peoples of the Americas, and the Conquistadores 1450-1608

A wargamer's guide to native and European armies in the Americas. The start and end dates are not rigidly adhered to, but there's a strong focus on the 16th century.

Resembling the old WRG books rather than an Osprey, each people or group of related peoples get a brief overview of their history and military character, followed by line art showing what their warriors are known or surmised to have looked like. Heath doesn't provide a full academic apparatus with citations for everyhing, but he does discuss the difficulties of the evidence were apposite, and provides a lengthy bibliography.

It's excellent.