Here's a fun idea: A digital book about the development of a game that's also a platform for that game's release. Game…book… ception? Nathan Meunier, author of This Book Is A Dungeon [This Dungeon Is A Book] describes his new project as "a multi-format creative experiment that merges the worlds of game design, interactive fiction, indie authorship, and self-publishing together in one crazy project."
Meunier took just over a month to teach himself Twine, and made a dungeon-crawling game he says mixes the interactive fiction elements of Twine with pixel art and the features of a traditional RPG game (try a free demo of the game). Along the way, he documented the process in a book he plans to release on Kindle with the game itself inside.
Among other game dev topics, the book also intends to explore the role Twine can play for self-publishing authors these days, an issue that I think is of broad interest (I self-publish some of my own experimental writing on Gumroad and itch.io from time to time).
For more info about Nathan Meunier's This Book Is A Dungeon [This Dungeon Is A Book], go here, where you'll also find a link to pre-order the project for a 30% savings.