Authors build elaborate worlds through everything from carefully-chosen foods to amateur map-making to breathtakingly detailed wikis, their attention to detail a signal that these are worlds worthy of getting lost in. Often these are specific moments in the text, or a helpful hand-drawn atlas bookending the epic adventure, or a bonus feature that’s just a click away. But some storytellers go the extra mile, embedding worldbuilding details into their texts as a sort of “found footage”—fictional childhood stories, comic books, or newspaper clippings that appear as excerpts throughout th...