Astrid Aven’s closest relative was her grandmother, Bryn Aven. Her grandmother kept bird houses outside every window. They both studied them and watched them together. Every part was cherished in her heart. But that all changed Astrids senior summer of highschool, just as Astrid gains an Internship as a bird doctor. Her grandmother passes on an ancient book, telling her to take every word seriously. But Valkyries? Norse gods? Odin and an ancient grudge? But her grandmother is gone before she can explain anything. She can’t explain who her parents were or why figures were showing up at every corner. The first rule in the book? Don’t look at them. Don’t touch them. Don’t let them know you can see them.