Just finished this book (The Indigenous Paleolithic of the Western Hemisphere by Paulette Steeves) and would definitely recommend it.
For those who were wondering about how she supports her arguments, she has assembled a huge amount of data for pre-Clovis sites and has plenty of discussion about how the discipline of archaeology has spent a long time resisting and denying the evidence.
I did find that she is sometimes inconsistent with her messaging for “how old, exactly.” There are lots of sites pushing occupation dates back into the 30-40kya (thousands of years ago) range. But a couple of times through the earlier chapters she mentions 130,000-200,000+ years ago, and the support for those dates really boils down in the final chapters to three sites - Valsequillo (200kya+), Calico (200kya), and the Cerutti Mastodon site (130kya). Other than that, the known sites are much younger- 55kya and newer.
Again, this is not my specialist area, I am an industrial archaeologist. And there are lots of reasons we might have so few very ancient sites that are correctly dated - surviving so many millennia, and being recognized when the signs are very subtle, are two key ones.
But on the flip side I have to worry that other factors like sample error could be giving much older dates - I just am not qualified enough to know either way.
Steeves’ main argument, though, is that we need to consider that humans were entirely capable of travelling to the Western Hemisphere (North and South America) long before Clovis technology (around 12kya), and that we as archaeologists need to incorporate Indigenous knowledge and expertise into our discipline. And I’m definitely sold on both of those things. I’d love to see more research done on these very old sites to see if we can gain more confidence in their identification and dating!