Brin's third book in this series was by far the best of the three, but I cannot help thinking that the whole endeavor was a mistake. Brin had a much greater appreciation, and knowledge of the previous Asimov writings and he kept(generally) within the framework of the Foundation/Robot writings. One glaring exception was his placement of the inception of the Gaia group on Eos 500 years before Foundation's Edge. According to Foundation's Edge (my favorite book in this series) and Foundation and Earth, Gaia was founded 12,000 years earlier by robot- accompanied refugees from Earth. A minor detail perhaps but it seemed to me that throughout this series the 3 B's played loose and fast with the "facts". All three books were very interesting and all three authors are excellent writers, however, it was perhaps a judgement error for them to get involved with this project. Benford was by far the worst, as he seemed to be making things up as he went along. Wormholes may be better science than hyperspace, but it isn't science alone, it's science fiction. A central tenet of Asimov's writings was that humans created robots and robots discovered hyperspace. Where these wormholes suddenly appeared from is a mystery and I am glad that Bear and Brin toned them out of importance. Greg Bear is a wonderful writer, but much too dark for this series. All in all the whole series was much too depressing. As any historien knows, 20 thousand years is enough for any civilization to completely have forgotten its past, why invent the amnesia theme? Personally I felt the Caliban series was much closer to the Asimov ethos. One idea I really liked of Brin's was that Hari Seldon's invention, his pride and joy, was the First Foundation alone. The Second Foundation and Gaia were forced on him. I hope Brin alone will continue these stories (and I hope he clears up the Gaia inconsistency).