It's 1975 and war is simmering beneath the surface of the Wizarding world. At Hogwarts, it's magic as usual as the fifth years prepare for their O.W.L.s amidst politics, pranks and other poor choices. But as tensions bubble over, sides will be chosen, friendships destroyed, families parted, and paths forever altered. The Last Enemy series follows the Marauders generation 1975-1981.

It's Katie Prewett's last year at Hogwarts and the boy she's been in love with since fourth year is finally single. The only problem? Relationships never seem to work for Katie, and boys like Eddie Bones don't fall for girls like her. At least not until Sirius Black steps in and offers to teach her what it takes to be a real heartbreaker. What could possibly go wrong? Sirius/OC