One I am reading now is a very early book by Cap Anson. It is "A Ball Player's Career Being the Personal Experiences and Reminiscensces of Adrian C. Anson." Seach amazon under "adrian anson" and it will come up. Right now, it is available as a free Kindle download. You don't need a kindle to read it. Android, iPhone and tablet/pad users can download a Kindle app for free off amazon.
http://www.amazon.com/Players-Career...s=adrian+anson
I also have been reading some of the earlier biographies on Lou Gehrig, my personal favorite. They were simple, and written more for young boys probably, but I love the innocence of the books and the stories about Lou's early life.