review:
I bought this sequel immediately after finishing Proxima. The story ended without answers about the aliens, the space-connecting hatches, and the apparent nature of hatches as changing universes or travelling across them. This book promised the answers. And it did deliver them. I didn't really like the historical spacefarers - they seemed to distract from the story itself which was about these world hopping hatch building aliens. I wanted more of that. The ending (spoilers) deals with the end of universes and the nature of multiple universes (parallel, yes) and how one theory for how they end can be made.,