Derek Landy is an Irish author and screenwriter best known for the Skulduggery Pleasant and Demon Road series. Since 2018, he has also written multiple comic book series for Marvel Comics.

He previously wrote two screenplays that were adapted into films: the IFTA award-winning Dead Bodies and the IFTA-nominated Boy Eats Girl, starring Samantha Mumba. Landy himself received an IFTA nomination for Best Script for Dead Bodies.

After becoming disillusioned with the collaborative nature of filmmaking, he turned to novels, beginning with Skulduggery Pleasant. HarperCollins acquired the rights for £1.8 million, launching what became a nine-book series, later followed by a six-book sequel series, a spin-off, a prequel, and a forthcoming three-book series currently in development.