Three Against the Witch World

"Three against the Witch World, book 3 in the first Witch World series, is different from the first two novels, which tell the story of Simon Tregarth, who came to Witch World from our world through an interdimensional gateway, and Jaelithe, one of the witches. The first two books follow Simon and Jaelith as they lead the fight against the Calders, an alien race that has passed through yet another gate. This book is told from the viewpoint of their eldest son, Kyllan, the first of triplets. He and his brother Kemoc, and sister Kaththea, inherited the abilities of their parents who shared a mental link, despite the rejection of the other Witches to believe that men can share the Power as it is called."--LibraryThing.