There are over 20 books in Brandon Sanderson's interconnected fictional universe, and it sounds like we're only around the ...
The Cosmere universe spans several fantasy book series and standalone novels, telling an overarching tale of conflicts between gods called Shards of Adonalsium. Mistborn and The Stormlight Archive ...
When authors work multiple series into one universe, it can get confusing for readers who are just getting into them.