This book is definitely thought provoking on many levels, and for that I give it the four stars. The aliens are of no stock, Star Trek variety, although I never felt satisfied that I knew what they were. The evolution of humanity is interesting, if a little radical. But where it lacked a star was its comprehension. With so much technobabble, I had a hard time following. And a lot of the ending didn’t really make sense, nor am I sure what exactly happened with the main character. But it still was intriguing.