It seems like the more they learn the less they know!
BTW, flipped back to one of your older references and there was an element of criticism of the "Clovis Only" thesis.
Since that time, and the discovery of Sa'ami marker DNA in North American Indians, the thesis has been ADJUSTED quite a bit. Now you find it common for analysts to suggest Europeans (that is, Sa'ami) made it to North America even 25,000 years ago, or possibly even earlier.
We note, though, that the time-line for supposed earlier East Asian penetration is focused on a single copralite found in a cave!
One more East Asian group has been added to the Sa'ami/Berber/Indian group ~ the Yakuts are now identified as having an ancient lineage from Europe.
These folks are, of course, ancestral to the Sakha, and to the Eskimo, and very closely related to the primary East Asian group that makes up the greater part of the American Indian background (for both North and South America).
An African tribe has also been added to the group with the clear implication that the Sa'ami marker genes were delivered TO Africans, not the other way around.
Catching up on the Sakha, they are mentioned in the Indian Epic "Mahabarat" among the "nations" fighting in the war between "truth and untruth". They were later expelled about 200 AD.