The Children Who Lived and the Philosopher's Stone

Harry, Anna, Luke and Sophie Potter have never played a sport while flying on a broomstick. They've never worn a Cloak of Invisibility, befriended a giant, or helped hatch a dragon. All they know is a miserable life with the Dursleys, their horrible aunt and uncle, and their abominable son, Dudley. Harry and Luke's room is a tiny cupboard under the stairs, and the quadruplets haven't had a birthday party in ten years.

But all that is about to change when four mysterious letters arrive by owl messenger: letters with an invitation to a wonderful place they never dreamed existed. There they find not only friends, aerial sports, and magic around every corner, but a great destiny that's been waiting for them... if they can survive the encounter.

When the quadruplets learn of an old magical artifact hidden somewhere in the depths of their new school, can the siblings and their newfound friends keep themselves out of danger for long enough to ensure it remains where it is, or will their curiosity and their natural trouble-finding side get the better of them all?