Thanks Pat Rothfuss, for recommending this book in his review.

I am never able to get enough hard science fiction. I always enjoy stories more when they have to deal with the hard speed limit. It makes the author's job more difficult, but I always have enjoyed the product much more when it is pulled off well. And boy does this book pull it off.

I felt like I was there trying to figure out the puzzles at the same time. I've never before been as satisfied to not have all of my questions answered. Of course, that doesn't mean I shan't be reading the sequels.