Coalescent is a science-fiction novel by Stephen Baxter. It is part one of the Destiny's Children series, and is the first in the reading order for the Xeelee series. The story is set in two main time periods: modern Britain, when George Poole finds that he has a previously unknown sister and follows a trail to a mysterious and ancient organisation in Rome (Puissant Order of Holy Mary Queen of Virgins); and the time of Regina, a girl growing up during the ending of Roman rule in Britain, around AD 400.
Coalescent was nominated for the Arthur C. Clarke Award in 2004.
Read more about Coalescent: Plot Summary