Multiple timelines, hundreds of characters, locations all over the known world. How do you keep track of them--and strengthen your book? Award-winning mystery/SF/fantasy writer Sarah Smith, who can't plot to save her life, shows her method.
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Here's the article about using it:
https://www.sarahsmith.com/outlining-a-big-fat-fantasy-in-airtable.html
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The art comes from a wonderful article on io9 by Lauren Panepinto. https://io9.gizmodo.com/art-appreciation-101-the-two-rules-of-awesome-sf-fanta-5621039