No Such Thing as Magic

Book 1 of the Phoenix series.

Elaine learns far more than magic at Hogwarts School of Witchcraft and Wizardry; after discovering that she's a witch, she escapes the people who've lied to her for eleven years. The only clues she has are two mysterious letters; one which was left with her the night her mother was killed by the Dark Lord Voldemort, the second from a man who calls himself her father.

Elaine hopes to discover her true identity at Hogwarts, only to learn that the truth is even murkier than the lies.

After all, there's no such thing as magic. Is there?