Prologue: A Most Unusual Gift

First of the 'Harry Potter and the Amulet of Time' series.

After Harry gets a strange birthday gift he and his friends end up in the time of the Hogwarts founders. Stuck there for a year the friends decide to learn all they can that could ultimately be used to destroy Voldemort. But life is never peaceful for Harry Potter and the Dark Wizard Salazar Slytherin is causing problems...