Title: In over their heads
Description: Nick and Eryn know what they have to do, but will they choose family over all humanity?
Subjects: Extinction (Biology), Twins, Brothers and sisters, Human beings, Juvenile fiction, Robots, Children's fiction, Science fiction, Robots, fiction, Twins, fiction, Brothers and sisters, fiction, Brothers and sisters -- Juvenile fiction, Extinction (Biology) -- Juvenile fiction, Human beings -- Juvenile fiction, Robots -- Juvenile fiction, Twins -- Juvenile fiction, Siblings, fiction