It was a decent book. I give it a B-/B for a trek book. The first half was more enjoyable than the second half. It would have been nice if the writer had found a way to continue the Berlinghof Rasmussen character's story in the second half of the book (as Sela really couldn't hold my interest as much).
One other comment about the writing, though: I enjoyed a lot of the dialogue, but it was occasionally impossible to tell who was actually talking (making it difficult to imagine the scene in my head).