The Potter Twins

Willow and Harry Potter had never even heard of Hogwarts when the letters start dropping on the doormat at number four, Privet Drive.
Addressed in green ink on yellowish parchment with a purple seal, they are swiftly confiscated by their grisly aunt and uncle.
Then, on the twins eleventh birthday, a great beetle-eyed giant of a man called Rubeus Hagrid bursts in with some astonishing news: Harry and Willow Potter are wizards, and they have a place at Hogwarts School of Witchcraft and Wizardry.
An incredible adventure is about to begin for these two twins.