Portals of the Grave — Lander Allen

What if someone buried a secret inside you? Scott, Miranda, and Dixon have no idea where they came from. At the age of seven, they fell through a portal onto the planet Cova. Their bodies were marked with mysterious surgical scars. Doctors and scientists watched them grow, always looking for answers. Were they aliens? Bio-engineered? Children from the future? On the eve of their adulthood, answers finally arrive. A scattered and tattered people from the other side of the world seem to know the truth about the portal. However, these new people hold subtle, unexplained powers. Can they be trusted? Whatever their intentions, they are a threat to Cova. Scott, Miranda, and Dixon are now in a race to find out who they really are. As they battle to save Cova from the threat of this new civilization, they must answer the most important question: are they the very weapons that could destroy humanity?