

Along for the ride is Earthshine, the artificial intelligence. It too ends up in the alternate Roman-dominated timeline. Meanwhile back in the Solar system a ship escaping the detonation of Mercury's kernel field (the mysterious power-filled objects) is saved from the dimension-ripping blast by the exhaust from its kernel drive. Now, I have to confess that I had originally thought that these legionaries were a group whose ancestors had been taken from ancient Earth, but it soon transpires that what we are actually in is an alternate timeline or something similar. Our party from Proxima's planet, Per Ardua, emerge from the new hatch to another world and face-to-face with a group of Roman legionaries, exactly as recounted at the end of Proxima. So if you have not yet read Proxima then do so first, and do not continue with this review as it would effectively be one big spoiler for you… This hard SF (as opposed to mundane SF which this is not) space opera starts exactly where Stephen Baxter's previous novel, Proxima, left off. Review of Ultima by Stephen Baxter Fiction Reviews
