adaptation of the series, if they were "the right person". His reason is that he does not want to sell it to any studio over concerns that the studio would ruin the film. At the 2012 Texas Book Festival, Nix stated that "(I) have no plans for movies but would like to see a card game." As of 2019, Herschend Entertainment Studios have secured the film and TV rights to the series, with Nix set to act as executive producer alongside Julie Philips, the vice president of Herschend. References External links Series listing at SciFan Allen and Unwin - Keys to the Kingdom Book series introduced in 2003 Series of children's books Heptalogies