From what you say, I don't think you've reached the end of the book yet. It's not as simple as that at all.
Just finished the book and I don't really see anything that conflicts with my original statement. Even Data says that his life before had concluded.
As far as a rating goes, I'd say its average. Solid but not spectacular.
It had a lot of interesting ideas but it bogged down in the middle. Didn't care for the death of Choudhury, just a road we've been down a couple of times already with Worf. It felt repetitive. Have a feeling that it'll lead Worf to question his fitness for command and whether he wants to stay in Starfleet.
Which makes me wonder if their not planning to try to some how fit the novels into leading into something based on or similar to Star Trek Online.