Genesis (The Journeys of John and Julia #1)

Secretly guided by a magical collective of superbeings called The Twenty-Two, a seemingly mismatched pair of teens deal with the aftermath of divorce, loss, and their conflicted feelings for each other. Little do they know that they have also cracked open the door to another reality—and unwittingly awakened the sleeping beast of their nemesis-to-be, the beyond evil Niem Vidalgo Oten.