I consider this series to be the best that Hamilton has done since the early Commonwealth books and Salvation Lost keeps the vibe going strong. Many words come to mind when I think of Hamilton's work, but until now, riveting has not been one of them. Somehow, he managed here to keep his deep detail world building (often a bit info dumpy) with the pace of a thriller.
Most of the cast remains the same in this installment, although the author does toss in a few new POVs, primarily of some street punks in London. We still have the story developing on two different timelines, the 'now' of 2204 or so, and (as we learned at the end of the last volume), some 10,000 years into the future. The 'now' part takes place in only a few weeks; the alien Olyix, tipped off that their covert plan is blown, begin their offensive to 'save' humanity; e.g., make them into mummies to store until the end of time. Needless to say, humanity is not very thrilled.
The 'future' part Hamilton developed much further than the last volume and he provides much more details. Humanity has been on the run for some 10,000 years after the Olyix conquered Earth and its fledgling colonies; we still do not know the details on that, but I take it the author will clue us in during the next installment. Anyway, the 'plan' as devised by the 'Saints' involved humanity fleeing in generation ships, colonizing worlds, and then moving on. Two great waves of humanity went in opposing ways across the galaxy. Their tech has developed quite substantively. The group we have been following as their last act before leaving their latest planet was to create some 'super soldiers' to take the fight to the Olyix. What they really want (and need) is the location of the Olyix enclave (for lack of better words). Once this is known, the 'plan' is to broadcast that and have humanity send a vast armada to take it down...
This series feels more like one novel cut into thirds, but Hamilton does provide something of a denouement at the end of each one. The only thing preventing me from giving this 5 stars is the to cute names for all the electronic gizmos of 'now' civilization. When you shop, for example, your bagez follow you around to store your purchases. You can call up a taxez for surface ride somewhere. Punk ride around on boardez (hi tech skate boards), etc. Please. 4.5 alien stars!b