A very dense book. I may have missed the point, but he seems to be fussing about stuff that seems either obvious, trivial or undecidable to me. The physics part was okay, though.
Comprehensive. Mostly read the last chapters that I needed for my studies, but it is clear that this is a very informative book and the result of some thorough investigation and hard labour by the author. Will definitely read the first half of the book at a later time to be fully up to date on the relativistic physics as I feel, this book delivers on the details more than with most other sources even though it is old!