Warning: This thriller is so addictive that we stayed up half a night to finish the book once we started it! The story revolves around 15-year-old Eli, whose dad is a famous tech inventor and billionaire. The family has a secret compound built underground, where Eli's dad has stocked years and years worth of supplies for the family, in case a nuclear attack happens and the family has to go live underground until it's safe to come above ground again. Surprise – the worst happens, and Eli, his mom, dad and siblings are forced to head to the compound when a nuclear attack hits the U.S. The family is safe, but heartbroken: Eli's twin brother and his grandmother didn't make it into the compound before the hatch had to be sealed, and the family must live with the fact that those family members will be gone by the time they can go above ground again. The family manages to slowly adapt to their new life, and six years go by – to the time when Eli turns 15 – until Eli begins to notice strange things about the way his father is behaving. Finally, the unthinkable happens: The family begins to run out of food supplies, and Eli's father suggests a horrific solution to the problem. Will Eli learn the truth in time to save all his family members from his mad dad's crazy plans? Prepare to stay up all night yourself to find out!