"Just because you can't see something doesn't mean it ceases to exist. I believe in many invisible things- ghosts, Bigfoot, unicorns. Mainly, though, I believe in myself- the girl hidden within the pale blue walls of this five-room, two story building under the unnerving fluorescent lights. I'm the girl no one has ever seen. But I exist. Don't I?" Compound 4 was burned to the ground. Compound 5 was liberated. Compounds 2 and 3 wait patiently for Jay and Isaac to arrive with the vaccine that has been created to protect what's left of the human race from The Virus that nearly wiped them out fifteen years ago. That leaves Compound 1, nestled in the deep woods of the northern United States. The warning they sent to Jay's supporters was clear: stay away. But Jay's never been good at following directions. Outside Compound 1, a laboratory exists. The bottom floor is a home; the upper floor is anything but. Mya Julien's life consists of needles, machines, tests and sickness. Being immune comes with a price, and when a dark-haired stranger crashes unwillingly into their life, she and her brother Finn discover a haunting truth. No one can miss you, if no one knows you exist. This is the last installment in the Immune series. Be sure to check out book one (Immune) and book two (Selected) before reading.

The aliens kill every human they catch, or in rare cases, put trackers on them to discover their hidden villages. When Natalie is caught in an ambush, she is unexpectedly released. But there is no tracker. The Saursunes have an entirely different motive this time. *** Run. Don't look back. When Natalie is trapped in an alien ambush, she is unexpectedly released. The first human to ever be let go. The Saursunes invaded centuries ago, and everyone knows that getting caught is certain death. Natalie is confused but grateful to be alive. As a porter, one of the few humans with the rare ability to teleport between special crystal formations, she must leave the safety of her desert village every day to help gather food. When other villages increase their raids on the Saursunes' farms, the aliens retaliate by hunting down every human they can find - except Natalie's group. Instead of trying to kill her and those helping her, they bring them food instead. Is it a trap? Or something else? Natalie isn't sure, but one thing is certain: the Saursunes aren't done with her yet.