Looks cool, however, it immediately sent 2 red flags up.
1) "Here's my special new theory where I explain why Einstein was wrong."
2) Never submitted to an actual peer-reviewed journal, instead you can only buy the self-published book on the internet.
In any event, the guy has the credentials, and I certainly don't have the knowledge of physics to really know if he's right or wrong, so I'll just wait and see what the academic community makes of it.