Usually these are internal documents not released. The Halo story bible is an exception which has seen parts released: https://www.halopedia.org/Halo_Story_Bib

Usually these are internal documents not released. The Halo story bible is an exception which has seen parts released: https://www.halopedia.org/Halo_Story_Bible https://www.halopedia.org/Halo_Story_Bible A portion of the story bible for ATLA was leaked: https://www.reddit.com/r/TheLastAirbender/comments/aj0mfp/the_original_story_of_avatar_the_last_airbender/ https://www.reddit.com/r/TheLastAirbender/comments/aj0mfp/th...