Quick-take: This was a different yet enjoyable style of Star Trek.
I dove in to this book thinking it'd be about the the underlings taking over the Enterprise. I was wrong. Very wrong.
There are plenty of stories where the characters are "trapped in a story". However, this one had quite an interesting take on it. It took a few turns with each iteration getting more interesting. The self-reflecting commentary was nice.
At the end there was a series of essays. This was the worst part of the book. I was actually pleading the book to end because each successive essay was decreasing my enjoyment and overall opinion of the book.
My recommendation: It is a good book. Worth reading. Abandon ship once the real story ends and the essays begin.