A few years ago I explored this concept and made a CMS for exactly these kinds of situations, also textbook reading, and in general any kind of endless/near-end

A few years ago I explored this concept and made a CMS for exactly these kinds of situations, also textbook reading, and in general any kind of endless/near-endless content that benefits from seamless space/time organization and navigation. See https://eagrereader.appspot.com/ https://eagrereader.appspot.com/ or my website itself https://dougkoellmer.com https://dougkoellmer.com for two uses of it. It's open source at https://github.com/dougkoellmer/swarm https://github.com/dougkoellmer/swarm if anyone wants to throw money at me to continue developing it. :)