Nephilim

Seventeen-year-old Rémy is a Conjuror—someone who can alter reality with his music. But such a talent comes with a price. He and his superpowered friends, Matt and Em Calder, are engaged in a dangerous battle to save humanity as we know it. If they are to succeed, they must first decipher a coded message in Rémy's dead mother's journal. A message which will lead them to an ancient scroll buried deep in the Vatican—and towards dark forces which have risen from the depths of time.

John Barrowman is an actor who has starred in Torchwood, Doctor Who, and Arrow. His sister, Carole Barrowman, is a talk show host and teacher in Milwaukee, Wisconsin. They are the authors of Hollow Earth, Bone Quill and The Book of Beasts.