In the late 1990s, Scholastic began publishing PC and handheld versions of these popular books in which a single player would move through similar pictures locating objects. The pictures are accompanied by rhyming riddles that prompt children to find certain objects within the picture. Based on the ageless search-and-find children's game of the same name, these books consist of photographs of familiar and household objects. Scholastic Press began publishing a best-selling children's book series by the name of I Spy in 1992.