Question: what is we need to talk about kevin based on?
Answer: We Need to Talk About Kevin is a 2003 novel by Lionel Shriver, published by Serpent's Tail, about a fictional school massacre. ... The novel, Shriver's 7th, won the 2005 Orange Prize, a U.K.-based prize for female authors of any country writing in English. In 2011 the novel was adapted into a film.