Harriet Potter and the Dark Lady of Avalon

Part 5 of Harriet Potter and the Guardians of Atlantis. Returning to Hogwarts for her fourth year, Harriet Potter is forced to deal with the growing realization that she is falling in love with Hermione. Meanwhile, Voldemort plots his return. But Harriet's Defense Aganist the Dark Arts teacher, now the dark witch Morgana in truth, has her own plans.