Ocean of Details,
This review is from: In the Ocean of Night: Galactic Centre Book 1 (Kindle Edition)
Astronauts discover the remnants of alien technology in Earth's solar system. Soon after this discovery a machine-crewed alien spaceship passes through the solar system and communicates with scientists working for NASA. This machine intelligence gathers a great deal of information about Earth's cultures and technological achievements.
And then it just keeps going, dropping enigmatic references to entire machine civilizations and their conflicts with biological "creatures of essence." As the story continues the protagonists learn more about these alien civilizations and their long-ago visits to Earth. There are some implications for what is likely to happen when they visit again. The outlook is troubling.
I wanted to like this book more than I did because I enjoy the basic ideas in the Galactic Center series, of which this is the first book. My problem was that the book took too long to reveal each interesting new development. I understand the need for character development, but really could have lived without knowing so much about some of the minor characters. However, I do recommend reading the book as necessary background for Across the Sea of Suns.