The Unicorn Rider

Archer Summers appears on his parent's doorstep on Christmas Eve with no recollection of the past year and a half that he'd been missing for. He's taller, stronger, older, and more changed than anyone else could have guessed. The police are stumped and his parents call it a Christmas Miracle. Everyone expects him to settle right back to his former life as a track star with a promising future, but Archer desperately wants to figure out what happened- and exactly who the black haired girl is that he sees in his dreams.