Spalding's Athletic library was a series of books produced by the Spalding sports goods manufacturer. Their Association Football / Soccer Guide was a yearbook of the game across the United States, covering various leagues, organizations and competitions.
Here are some links via which you can read a selection of these excellent and interesting books on line:
1910
1914-15
1915-16
1916-17
1917-18
1918-19
1921-22
1922-23
