Love Beyond Time — Rebecca Royce

Born one half of a perfect pair, Kal has spent his life believing his other half is gone. But when fate thrusts Isabelle into his arms, he will have no choice but to become the man he was destined to be. That is, if he can battle his own demons first. Not willing to accept her heritage as an Outsider, Isabelle tries to hide from the truth. But when Kal's life is on the line, she will have to step forward and embrace her powers or watch everything she has come to love disappear.