Just read it. It was pretty good. It was far better than Singularity Rising and provided a decent summery of MIRI and FHI's arguments.
The book is now available for pre-order. Luckily, according to the author, MIRI changed its name just in time for that change to propagate to the manuscript. MIRI's research is featured pretty heavily in the book.
Announced here. Full title is Our Final Invention: Artificial Intelligence and the End of the Human Era. The author is James Barrat, best known (for now) for his TV documentaries. I chatted with him online; he'll be at this year's Singularity Summit.