Horrid Henry is a children's book series by Francesca Simon and illustrated by Tony Ross. The first Horrid Henry book was written and published in 1994 by Orion Books and as of 2015, there have been twenty-four titles published, as well as many other collections, activity books and joke books. Novel Entertainment produced an animated television series for CITV. It is a slice-of-life series featuring the titular Henry, a self-centred, naughty prankster who has issues with authority who will typically be faced with a problem and then will often retaliate in interesting ways that involve trickery, rule-breaking and elaborate practical jokes. Henry has a brother, whom he bullies, called Perfect Peter, who is the exact opposite.