Avatar (2009 film) themselves to change into a Na'vi. "Avatar: A Confidential Report on the Biological and Social History of Pandora", a 224-page book in the form of a field guide to the film's fictional setting of the planet of Pandora, was released by Harper Entertainment on , 2009. It is presented as a compilation of data collected by the humans about Pandora and the life on it, written by Maria Wilhelm and Dirk Mathison. HarperFestival also released Wilhelm's 48-page "James Cameron's Avatar: The Reusable Scrapbook" for children. "The Art of Avatar" was released on , 2009, by Abrams Books. The book features
Avatar (2009 film) globally in McDonald's Happy Meals. In December 2009, France Post released a special limited edition stamp based on "Avatar", coinciding with the film's worldwide release. "Avatar" premiered in London on , 2009, and was released theatrically worldwide from to 18. The film was originally set for release on , 2009, during filming, but was pushed back to allow more post-production time (the last shots were delivered in November), and to give more time for theatres worldwide to install 3D projectors. Cameron stated that the film's aspect ratio would be 1.78:1 for 3D screenings and that a 2.39:1 image would be