Twin Souls Book 1

Twins, Leah and Zach, have been imprisoned in the Labyrinth for a week, or so they thought. When they leave, they find themselves in a world unlike their own, were advanced technology is completely normal and nearly everyone owns their own "Phones". But most importantly, a camp just for Demigods like them. Had they really been in the Labyrinth for a week? Or was it much longer...