Greg Bear stresses the science in science fiction. To the detriment of his characters, I think.
I have to admit to skimming over the very technical bits, which I'm sure made the book for some people. But the characters were flat. They're just there to be acted upon. I had no feeling for them when they were in danger. And the technical stuff was so far over my head that I really didn't understand where the author was going with the ending.
Definitely outside my entertainment zone.
(This review was originally posted in Goodreads)