It's basically worthless. The posted website is exerpts from the book "The Cosmic Conspiracy" by Stan Deyo. He also maintains the website "The Millenium Ark". From the "Ark" Website: "everything from dreams and prophecy to science and spiritual matters to LOTS of emergency preparedness information. "
He is evidently either trying or has produced movie with with Stanton Friedman, Dr. Alan Hynek, Jacques Vallee, Ken Arnold, Betty Hill and Ray Palmer The above, in addition to his apparent status as an "authority" on UFOs and Atlantis, is not exactly something that would inspire confidence in his conclusions about Einstein. Especially as he either misrepresents or misunderatands several experiments that he claims "refute" Einstein.
I will end here as any other comments I would make about the above sites and conclusions may get me banned.
I spent some time there tonight, trying to understand exactly his objective is and my brain is fried. I'm looking at the math and will try to get back to you tomorrow.

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Some try to tell me, thoughts they cannot defend,... - Moody Blues.

Neptune- The original Dark Matter.

The author feels that this technique of deliberately lying will actually make it easier for you to learn the ideas. - Donald Knuth