Shadow Fall
(Young Adult Book)

"The asteroid hurtling toward the earth will kill billions. The Emperor and his Gold Court will be safe in their space station, watching from the stars. The Silvers will be protected underground. But the Bronzes must fight it out at the Shadow Trials for the few remaining spots left on the space station. When an enigmatic benefactor hands Maia Graystone a spot in the Trials, she won't just get a chance at salvation for her and her baby brother, Max: She gets to confront the mother who abandoned her in prison, the mad Emperor who murdered her father, and the Gold prince who once loved her. But it's the dark bastard prince she's partnered with that will make her question everything, including her own heart. With the asteroid racing closer every day, Maia must trust someone to survive. The question is who?" -- Amazon.com.