Society for American Baseball Research-SABR
Has 5,000 biographies O(read a couple;they're good), baseball research, thousands of articles from the Baseball Research Journal, stories on famous games, no-hitters, etc.
Here's one for those who love esoteric baseball analyses....OOP (Overall Offensive Performance).
OOP = Bases Advanced divided by outs created (in case you didn't know) https://sabr.org/journal/article/stats-and-studies-overall-offensive-performance-oop/
Good for this time of year.