Atonement — Nina M. Osier

It's going to take several lifetimes, or maybe longer, to reach Earth. The survivors from the alien-occupied Farthinghome star system have nowhere else to go, so they're setting out with what little they have left. Of the refugee fleet's three leaders, Magister Charra Waxwoman has given up already on their hopeless quest. Now Commodore Aisha Tambour and Father Bazel daKiev must fight to hold their people together as they reach the border of deep space. Is there any way to cross the gulf that separates them from Humankind's first home? Or must they face death in the void, so their descendants may one day find safe harbor?