Originally Posted by JSWolf
The new timeline is an alternate timeline. If it wasn't, it would be a paradox and that's not allowed to happen. So what happened was once the timeline changed, it became another timeline.
As for the books, they are very good and I do suggest you keep on reading.
The following is my own view on the new Star Trek movie and its resulting timelines (I'll put it in a spoiler for those who've not seen the movie):