World of Warcraft has a massive collection of in-game lore books, scrolls, and other documents, but it would be great to have a dedicated collections tab for these, similar to the toy box. I love reading the in game lore, but due to limited bag space, most of the lore items I find end up being read once and then deleted. A system like this would make it much easier to revisit and enjoy the game’s lore without worrying about inventory space.
ESO has a similar system where, after completing the Mages Guild questline, you learn the ability to memorize every piece of in-game literature you come across. These are then stored in a dedicated tab for easy access later.