Anya Barton Book One: It Started with a Letter

"Born from light, blessed by darkness..." She wasn't supossed to exist, but destiny has more ways that no one knows. Anya Barton receives a letter from a man whom she calls "Mr. Dumbledore" and suddenly she's send to a magical school, where she meets her new best friend, muggleborn Hermione Granger. Can they help the choosen one to protect the Sorcerer's Stone from You-know-Who?