None of them are new releases, just one's I've come across recently.
Tomorrow, When the War Began - John Marsden
When Ellie and her friends go camping, they have no idea they're leaving their old lives behind forever. Despite a less-than-tragic food shortage and a secret crush or two, everything goes as planned. But a week later, they return home to find their houses empty and their pets starving. Something has gone wrong--horribly wrong. Before long, they realize the country has been invaded, and the entire town has been captured--including their families and all their friends. Ellie and the other survivors face an impossible decision: They can flee for the mountains or surrender. Or they can fight.
Good Behaviour - Nathan L. Henry
Jailed at age sixteen for armed robbery, Nathan Henry was the kind of teenager most parents and teachers have nightmares about. His crime was the culmination of a life lived on the edge: guns and drugs, sex and violence, all set against the ordinary backdrop of a one-stop light town in rural Illinois. Nate’s personal history is both disturbing and fascinating. A rough childhood becomes an adolescence full of half-realized violent fantasies that slowly build to the breaking point. But these scenes alternate with chapters about Nate’s time in jail, where through reading and reflection he comes to see that his life can be different from all he’s known up to this point.
Harmony - Project Itoh
In a perfect world, there is no escape.
In the future, Utopia has finally been achieved thanks to medical nanotechnology and a powerful ethic of social welfare and mutual consideration. This perfect world isn't that perfect though, and three young girls stand up to totalitarian kindness and super-medicine by attempting suicide via starvation. It doesn't work, but one of the girls--Tuan Kirie--grows up to be a member of the World Health Organization. As a crisis threatens the harmony of the new world, Tuan rediscovers another member of her suicide pact, and together they must help save the planet...from itself.