This book is simply one of the best. Nothing I have ever read in all of the 500+ books I have consumed (at least half being sci-fi) has come close to the depth and entertainment of this book. Not only does it entertain, but this is one of those few books that truelly makes you think. The sheer scope of the epic is unbeleiveable. It goes through 2 very different primary species on Earth, a group of beings that literaly eat the pain of lower races, an aloof group of beings from another reality out for revenge, it goes on and on. Throughout it all, the central thread is humanity itself.
When you finish reading this book, you won't put it down and pick up another. For days at least, you will just sit back thinking about the book saying "wow that has heavy, but SO great". It is unparalleled at what it is, one of those small genre of Sci-fi books all by its self. The end of time/universe/etc book. Besides the central plot of the book, and all the many subplots, the story actually strives to tell something in its completness and complexity. The book shows the unstoppable power of the human spirit, and humanity as a race's unwillingness to give up or surrender. Infact, at several points thoughout the book, the Rimstalker actually handycaps humanity against the high tech Zolt, fearing that humans would prove too difficult of prey. That would cause the solarsystem sized trap to be unsucsessful.
In summary, simply a beatiful master peice, long neglected. Honestly, I have no idea why this book is not considered one of the great "must reads" of the science fiction world. If you ever see a copy, BUY IT because this great (and unfortunately rare) book is out of print. Enjoy it while you can. One for the ages.