3 Works in Classic Canon (Challenge)
When Harry's aunt and uncle die, he is sent to Hogwarts, to live with his only remaining relative, Severus Snape. There he discovers a mysterious secret garden that has been locked for ten years. Why? And what is that strange crying he hears in the night?
The word you're looking for is "ontological paradox."
Fandoms: Harry Potter - Rowling
24 May 2003