Santa Barbara-based iStoryTime, the mobile children's book line, said this morning that it has launched a new Arthur Christmas Movie Storybook for the iPhone and iPad. The new title--tied into the Aardman/Sony Pictures Animation movie--is the latest in a series of movie linked titles for iStoryTime, which has been producing both brand- and movie-linked children's titles as well as publishing iPhone and iPad children's titles from less well known authors. iStoryTime said the new app, available for $3.99, includes original content from the film, including images and character voices. iStoryTime is operated by zuuka.