The Bombs Fall — Michelle Muckley

Zachary Christian is Delta Tower resident 8652. He has been stuck inside his tower since the bombs destroyed the world he knew. The reason for the war is still a mystery, but ever since that day the world stands still, trapped by the nuclear winter and the Guardians who patrol the exits. Zachary should feel lucky to be alive, but he is haunted by past mistakes which he never got a chance to put right. The only way out is the New Omega Lottery. The prize is a place in Omega, a giant glass tower in the centre of their barren world where the new government, The Conservators, rule. Nobody from Delta has ever won. But when Zachary meets Emily he knows she is not from Delta. Convinced there must be another way out, he vows that he will find it. But he doesn't realise that The Conservators have already found him. Also in The Dawn series (coming soon) Call of Omega (book 2) Everybody is Somebody (book 3) Man in the Middle (book 4) Rise of a Hero (book 5)