Thank you so much!! Feel free to message my wall any time, and when I get the conversations feature enacted, feel free to message me that way too.
It's from a book series called 'Skulduggery Pleasant' by an Irish author called Derek Landy. He also wrote 'The Demon Road' which though I didn't think it was as good, it was the first fantasy novel I'd read with a lesbian main character, so I was still impressed by his courage in doing that. And yeah, bird is better than slender man look alike.