Given wizardry is her forte, it comes as no surprise that JK Rowling’s particular brand of magic has extended to sales of a script inspired by one of her stories — Harry Potter and the Cursed Child Parts One and Two has become the fastest-selling script of all time.

An ex-military man tries his hand at writing, publishes a debut detective novel, and wins critical acclaim. But here’s the twist in the tale: The true identity of the author is none other than Harry Potter creator JK Rowling.