Ascendance (The Descendants, #4)
by Vrinda Pendred
10,000 years after the Great Deluge that inspired flood myths around the world, Earth is about to be drowned again. And this time, it won’t just be Atlantis that’s lost. The Descendants and their friends must band together if they ever want to survive. But that isn’t easy when they’re torn apart by the truth of their origins and can no longer be certain what’s real.