From Amazon's product page:
A coffee table reference, which includes personal and professional stats along with a brief biographical narrative for each of the 393 players of the T206 collection, plus over 500, actual size, full color images of the cards. This volume celebrates the 100th anniversary of the cards which were printed between 1909 and 1911, when the popularity of baseball really exploded. From that era came Ty Cobb, Walter Johnson, Tris Speaker, Nap Lajoie, and Cy Young.
This looks to be a great hobby book.