I admit it: I read this. I was standing in a bookshop in Heathrow not finding anything and the guy next to me recommended it. He emphasized there's nothing even remotely related to or suggestive of scientology in it; it's just sci fi. I don't know much about scientology, but I can corroborate the "just sci fi" part. Anyway, I needed something for some long flights, so I took it.

It's a 3000-page pulp scifi monster. Fortunately, the pages go fast, very fast. It's Earth, much later, and the Bad Guys have taken over and Our Hero has to get the Earth back for the natives, overcoming the most powerful race in the galaxy. Stuff happens. You get the idea.