I read Chariot of the Gods when I was young and thought it was great - exciting ideas about how the world isn't quite how it's boringly portrayed. And aliens!

However, I tried re-reading it when I was a bit older and it was just laughably bad. Seemed to be a whole bunch of leading questions and then throwing random assumptions into the mix.

When I was older, I started reading a bunch of Robert Anton Wilson books and was introduced to The Sirius Mystery by Robert K G Temple - now that's a much more serious investigation into Ancient Aliens visiting the Dogon people.

Of course, we should really be tracing back the Ancient Alien theory to Lovecraft's fiction.