If you were looking for a book that would fill you in on all the details that might have been missed in the film, Star Trek is not the story for you.
For whatever reason, Foster took the script and did not deviate one iota. What you saw in the movie, you get in the book.
There isn't any additional back story for any of the characters, you don't learn more about the older Spock or the Red stuff they use to destroy Vulcan.
I think this book was published for hungry Star Trek fans who couldn't wait for the DVD.
It reads just like watching the movie without the actual images.