The Eternal Night: In the Blood 4
by Sandra Ross
Secret learns of early vampires with mixed human ancestry who live and walk during the day, but wakes up as vampires later in life…correctly seeing the same in their changing into those of hers. He understands now why he is drawn to her so strongly. She is his mate. And he has to be there when she starts sleeping the sleep for the first time, or she will never wake into her own eternal night.