Axpherial: YA science fiction by AJ Kelley

The majestic Tranquility realm is home to Axpherial, a world of superhumans, advanced technology, and hovering lands. Yet, in the Anarchy realm, Earth is wretched with the viola virus; the most lethal virus known to mankind. When two adolescents from these planets meet, they uncover the fact that both their worlds are in jeopardy. As more secrets come to light, the duo is stunned to find that nothing is what it appears to be, and they may not possess the power to fend off the impending danger.