Not who you’re replying to, but two books that stood out to me in that regard, especially as an American, and left a lasting impression are:
(1) Bury My Heart at Wounded Knee by Dee Brown, and
(2) Sundown Towns by James Loewen
Dee Brown's book is fantastic. And I've instantly added Sundown Towns to my reading list. In that genre I'd highly recommend "Devil in the Grove" by Gilbert King.