John Kenn Mortensen was born in Denmark in 1978. He is a writer and producer of television shows for children. The father of a pair of young twins, he finds he has very little time to do anything much, but when he does have a spare second, he draws pictures of monsters on post-it notes.

I’ve probably already seen more monsters than most do in their whole life, but I’m still none the wiser as to why some monsters work and others don’t. I know even less about why certain monsters push a special button at the back of my brain, evoking all kinds of half-forgotten dreams and feverish imaginings from my earliest childhood. What I do know is that John's monsters absolutely hit the spot