Good Enterprise novels?

I always thought that the idea of Enterprise was intriguing, and that the characters had a lot of potential. I don't think the show lived up to its own possibilities. But that's where books can make up the difference, maybe!

So, can anyone recommend some Enterprise novels that are worth reading?

(Especially if they have nothing to do with the "Temporal Cold War" and aren't simple jailbreak stories. The show already has those angles covered.)