Top positive review
Weber with a new(ish) take on time travel
Reviewed in the United States on January 25, 2021
Actually better yarn than the predecessor. Weber's take on crosstime SciFi. The action is very up to Weber's best levels. Lots of issues, well-matched opponents... The first novel set the stage for the concept of time travel that could not change the past, until after many atrocities, the main story line discovered they were causing universal splits, and encountered a cross-time contemporary -- and a disaster coming from the past.
This yarn looks at the aftermath, and another case of a different split, and in more detail. These two stories are best read in sequence, but are both stand-alone yarns. I personally find some plot elements hard to suspend belief regarding, but I know more of physics than I did 40-50 years ago. And Quantum Mechanics does have some adherents to some form of multiverse caused by different past choices. As is the case for pretty much all time travel Sf, who knows what might be possible.