Yeah, exactly – work it in naturally and believably, in a way that someone within the world would discover these things. Doesn’t have to be a library, but there are huge opportunities to capture that sense of wonder and mythology that human beings have felt as they have created stories over the past hundred thousand years. Don’t tell me the lore in a block of text, have an old woman recount tales of her childhood by a winter hearth, misremembering details, but with an understanding that to her, the details aren’t what’s important. Have a guitarist by the fireside sing a song of the ancient ways, myth mixed with history, the version changed to suit his personality and beliefs, one version among many of the same song. Have children run around, playing as their heroes from the ancient stories, urging you to join in as the spider god, a trickster who disrupts the natural order of their game and steals children away (to wash up for supper before their mom gets worried). Mythology isn’t words, it’s people.