Alex Rier is a series of spy novels by English author Anthony Horowitz about a young spy named Alex Rider. Seven novels have been published to date. The first novel, Stormbreaker, was first released in the United Kingdom in 2000 and was adapted for a motion picture in 2006. The novels are published by Walker Books in the United Kingdom and by Puffin in the United States. Due to primarily being spy fiction, the series is compared to James Bond, the CHERUB series by Robert Muchamore, or the Six of Hearts books by Jack Heath.