2011 novel in The Enemy series by Charlie Higson
The Fear is a post-apocalyptic young adult horror novel written by Charlie Higson. The book, released by Puffin Books in the UK on 15 September 2011 and by Disney Hyperion is the third book in a planned seven-book series, titled The Enemy. The Fear takes place in London, a year after a worldwide sickness has infected adults, turning them into something akin to voracious, cannibalistic zombies. Wikipedia