Interesting theories.
They're interesting theories, if a bit on the fringe side of things. That said, any of them could yet be proven to be true. It's not an uncommon occurence with fringe theories.
I'm not an authority on any of the theories presented in this work, but I find it an interesting piece of work.
It's worth mentioning, mind, that "The Sirius Mystery" is the only book, paper or thesis I've personally heard of that proposes a link between the Dogon and extra-terrestrial life, and that many noted anthropologists actually believe the Dogon knowledge of Sirius B is a by-product of European cultural contamination rather than having been handed down from antiquity. Nothing proven, mind, but heavily debated.