I Am Not of This World

This book is about an alien that saved the life of two infants from another planet. He escaped with his life, and the two children who were to inherit the throne as king and queen of the planet Eridani. A murderous villain took over the kingdom and killed one the children's parents, and took the other as hostage. The children will attain all their super powers by the age of sixteen, and when all their powers are manifested, they vow to return with their guardian and confront the villain. Meanwhile, Earth is in jeopardy of annihilation and they must stop the threat.