A deadly virus has destroyed Kaelyn's small island community and spread beyond the quarantine. No one is safe. But when Kaelyn finds samples of a vaccine in her father's abandoned lab, she knows there must be someone, somewhere, who can replicate it. As Kaelyn and her friends head to the mainland, then encounter a world that's beyond recognition. It's not only the "friendly flu" that's a killer, there are people who will stop at nothing to get their hands on the vaccine. How much will Kaelyn risk for an unproven cure, where the search could either destroy those she loves or save the human race?The Lives We Lost is an exploration of humanity, of inner strength, of the drive to stay alive. The world around Kaelyn is slowly descending into utter madness and chaos, and she will have to battle her way through everything that's thrown at her in order to complete her mission: to return the world to what it once was. To bring back everything that's disappeared under the snow.The book, the series, is eerily realistic. The disease, the bleakness of the situation, the degradation of society and governments, the sudden loss of the things that were once easy to obtain like food, heat, and shelter, the struggle for survival. The situation is not over-blown or exaggerated, not filled with action or battles for the cold box or constant drawing of guns, but it is tense enough to keep your heart pounding past the last page.Kaelyn is pushed down by the weight of everything on her shoulders, but she's the one who put it there. She's the one who had the idea to take the vaccine off the island, she's the one who wants to save everyone, she's the one who wants her peaceful life with her healthy parents and her friends back. And she will go as far as it takes. Will she do anything? I don't think so, we all have our limits, but she believes in this cause so strongly that she will travel as far as she must. Previously, it was Kaelyn against the disease, against herself as she built up her strength and courage. Now, it's her against the world, a world far different than the one she remembers, a world far more dangerous and desolate.In the first book, Kaelyn recounted the events of the disease on the island to Leo in a journal, but now he's there, now he's right there with her. But so is Gavin. It's something she doesn't need, to be pulled between Gav's support and Leo's familiarity, but it's what she gets. And sometimes it's both that help her continue the long walk.There is something about this book that is utterly depressing, perhaps it's the complete breakdown of society as we know it now, but you can't help but have hope for Kaelyn and her group. You can't help but hope they make it, that Kaelyn finds the right people to give the vaccine to, that they all make it there alive. They have the strength and the resolve to continue on this seemingly impossible journey, they can only hope the world doesn't come after them before they reach the destination. It will be a long and arduous wait for the final book of the trilogy.