Nephilim (The Seventh Day Series)

Will is a good kid; sweet and thoughtful with a genius IQ and a smart mouth. But, when his powers reveal themselves, he'll have to learn to control them or face the wrath of his archangel aunt, Gabriel.Lucifer's returned, tracking an emotional escapee hell bent on wiping out humanity. This new foe spreads disease the likes of which the world hasn't seen since the Bronze Age. Before all life on Earth is destroyed, Lucifer must seek help from his sisters. With thousands of demons running amok, the siblings will have to do whatever it takes to stop them, even if it means disobeying God.