Flight — Sherry Taylor

Murderous uncle, magical portal, talking animals and demons from the Underworld. It's enough to drive any sane person crazy. In a small town at the base of the Uintah Mountains, best friends, Kiera and Dustin, are running for their lives. After barely escaping strange creatures that can only be described as demons from Hell, they discover their parents have been murdered by Kiera's biological uncle, Exar, and he is now after them. Not knowing where else to go, they hide in the only place they can think of. The cave. No one ever goes near the cave. While hiding inside, they unravel the mystery of a portal and are whisked away to another world where they find they have magical abilities. But this is Exar's world, and he still wants them dead. This is the first book in the completed Ceramia trilogy and ends in a cliffhanger.