Top 10 "unsuitable" books for teenagers

Patrick Ness has written two books for adults, (the novel The Crash of Hennington and a short story collection titled Topics About Which I Know Nothing). He published The Knife of Never Letting Go, his first young adult book, in 2008. It won the Guardian Children's Fiction Prize and the Booktrust Teenage Prize. The sequel, The Ask and the Answer, won the Costa children's fiction prize, and was