Some time ago I was able to download a whole screed of stuff on Valery Uvarov and Tunguska from the Nexus Magazine website. It was an intervies with him conducted by, if I remember correctly, Graham Birdsall. It was originally published in the June-July 2003 issue of Nexus magazine. Volume 10, Number 4.
Sadly, it doesn't seem to be available as a free download any more but for anyone interested enough, that issue of the magazine can still be purchased.
Just do a Google search on "Nexus Magazine" and follow you nose . . . . .
Also, there is another interesting book suggesting how the Giza pyramids were constructed. I stumbled onto it when I was sussing out more data on the Coral Castle. It's called "The Pyramids an Enigma Solved" by Dr Joseph Davidovits and Margie Morris.