Admin Edit: I'm hijacking this thread because the book's release date is upon us, and there's no need to discuss the excerpts any further once people get the actual book. -Kahi
I thought it would be good to have a place to list all the things we have learned so far from the book excerpts.
The Protector of Water is officially confirmed to be male.
There are probably multiple villages per region.
"Young" villagers are a thing.
The Protector of Earth is Female.
The protectors have names.
Kopaka has a working telescopic lense on his helmet.
The protectors expected the Toa to know who they were. (Willess12)
Ekimu is confirmed to have magical power or something. (Willess12)
Basher's mask does it actually fly off when his horns are hit, giving them actually combat usage. (Rockho)
Makuta is "Out there"
The Toa get new masks and possibly get upgraded.
Onua's claws are referred to as fingers.
Add things I may have missed below!