The Totally True Stories of Alexis Applebaum

Six friends start their fifth year at Hogwarts and find a disagreeable Professor, a love obsession, and an old enemy turned friend. But what will happen when the six are invited to join Dumbledore's Army? What will they choose? Or will they stand up to Dolores Umbridge in their own special way? This is a Harry Potter fan-fiction except Harry is not mentioned once.