What better place to start on Brazil and South America in general than to look at Laurie Krebs' amazing travelogue books. As she herself says, I wrote them because...
"In creating my picture books, I have combined my love of children's literature with my love of traveling to fascinating places. I hope through my series with Barefoot Books to introduce young readers to people and cultures that might be unfamiliar to them."
I am going to start with We're Roaming in the Rainforest and a map of South America so that we can locate pertinent places.
Then we can read other books, from either Laurie Krebs or ones set in South America such as those on the Pinterest page.