There's a humble Bundle with all of the current Shadowrun sixth edition books. I'm reading the core and I'm a little surprised that I'm twenty pages in and they haven't mentioned the main metahuman races.
https://www.humblebundle.com/books/shadowrun-trpg-catalyst-game-labs-books
I am happy to see that it goes over what is going on at least at a high level on the major continents if the Earth. It was a real oversight of previous editions to not mention anything outside of a few continents.