Hope you're enjoying your copy of Baseball Prospectus 2012. In 1890, people had to make do with books like this:
Stories of the Base Ball Field: The National Game's Great Exponents and Their Methods (Together With the National Playing Rules Governing All Clubs Party to the National Agreement): An Entertaining Collection of Dressing-Room Yarns and Humorous Incidents in the Lives of Noted Players.
You can read a full copy online at the Library of Congress website and get ready for the 1891 season.
Previous Internet Christmases:
I: 1930 Spalding Base Ball Guide
II: Negro Leagues Database
III: Bob Gibson video
IV: John McGraw's Scientific Baseball
V: NBC Archive, featuring Bud Selig
VI: 1888's Base-ball: How to Become a Player
VII: Connie Mack's How To Play Base-Ball
VIII: Life Magazine's greatest baseball photos
IX: Branch Rickey's scouting report on Don Drysdale
X: 100,000+ crowd for White Autos game
XI: Thomas Edison video
XII: Babe Ruth in Just Pals