Adam Nevill (also known as Adam LG Nevill) is an English writer of supernatural horror, known for his book The Ritual. Prior to becoming a full-time author, Nevill worked as an editor. After publishing several novels through Pan Macmillan and St. Martin's Press, Nevill chose to self-publish his 2019 novel, The Reddening. Nevill stated that his reasons were both financial and creative, as he wanted more freedom in how he could market and package his works. The novel was published under his imprint, Ritual Limited, which he created in 2016.