We first mapped the Amazon River Basin for a rainforest protection conference many years ago, preparing what we thought was a pretty good rendition until we arrived at a conference full of experts who were able to add so much more data that we re-did the map before publishing it. We have updated it repeatedly as more information has come to light and are pleased to release this sixth version, which does something that we have wanted to do for some time - it adds a detailed map of the northern half of Brazil/Brasil to a river map that covers portions of seven different countries. The map is printed on revolutionary stone paper (tear-resistant, waterproof, friendly to the environment, and bio-degradable as well as extremely durable), and has two different cover pictures, so it can be marketed either as a map of Brasil or of the Amazon Basin - or both! It is also the only map of the river basin in print. As the world emerges from the era of Covid, this part of the world will once again dominate demand for South American explorers.