The Charmed literary franchise is a series of novels and short stories based on the eponymous television show, which aired from 1998 to 2006. The franchise consists of forty-three novels and eleven short stories released in two anthologies, with ten guide books. Scholarly essay collections on the show were also published. The first work in the series, The Power of Three, published in November 1999, is a novelization of the series pilot "Something Wicca This Way Comes". Writers of the novels had to obtain approval from Paramount Pictures or CBS Consumer Products to ensure that they followed the canon established for the television series. Writers Paul Ruditis and Pat Shand have discussed these regulations, primarily through their official Tumblr accounts.