2017’s Children of the Divide is the third but probably not final volume in Patrick S. Tomlinson’s Children of a Dead Earth series.
A generation after their ark parked in orbit around Gaea (one of Tau Ceti’s life-bearing worlds), the refugees are well on their way to building a new civilization to replace the one they lost. There are just two problems:
Tensions between humans and Gaean natives could result in civil war.
The aliens who destroyed Earth may have once lived in the Tau Ceti system — and may return.