Invisible Fiends is a six-part horror series that tells the story of a boy named Kyle Alexander. When Kyle was four, he had an imaginary friend - a happy, cheerful little guy, whose unfortunate speech impediment earned him the name, Mr Mumbles.
Like all kids, Kyle grew up. By the time he was six, he'd stopped seeing Mr Mumbles. By the time he was nine, he'd forgotten that Mr Mumbles had ever existed.
But Mr Mumbles never once forgot about him.
On a dark and stormy Christmas Day when Kyle is twelve, a very different Mr Mumbles returns. This time he doesn't want to be friends, and he has no intention of playing nice. All he wants is a violent and bloody revenge on the boy who forgot about him, and he will not stop until he gets it. Now all Kyle can do is run and hide and try to stay alive long enough to figure out what the Hell is going on, and maybe - just maybe - find a way to stop it.
Over the course of the series, Kyle will discover that Mr Mumbles is not the only forgotten imaginary friend to have returned. In each new book he must face horrors worse than those that have come before. And with each twisted fiend he faces, he will come closer to discovering the reason why they have started to return, and what his part in all of it is.
From a quiet Christmas dinner to the explosive end of the world, Invisible Fiends, is a terrifying, action-packed series certain to keep readers old and young alike on the edge of their seats.