I picked this up last night before bed just intending to dip my toes into the book, but ended up reading the entire thing. I finished sometime around 2 a.m. *yawn* This was a clever, witty, brain-tickling metanarrative that pokes fun at the utter implausibility of Star Trek, but in a way that people who love the show can appreciate. I laughed a lot. The only thing that kept me from rating this five stars is that the codas at the end felt like Scalzi was carrying the joke on for too long and overexplaining it, c.f., this scene from Austin Powers, International Man of Mystery: http://youtu.be/El4tHP5HdPA
But the main body of the story was chock full of awesome.