Yazen:1st book in the Ponith series

Zac Belstryke is about to turn fifteen-years-old and he’s going to learn more about his family history than he’s bargained for. Zac and his friends are going to go on a summer trip of a lifetime, to another planet called Yazen. But once they get there, they realize that they can’t come home until they find a specific gem to activate the portal. They will meet many new creatures along their journey.Will they retrieve the gem from the Dark Lords or will they remain in Yazen forever?