If you've made it this far down the line and haven't been convinced to stop what you are doing and read
Glory of Their Times, then I'll have to plus one it again. There's even a cover version with T205's on the front!
I would be remiss if I didn't also mention
Walter Johnson: Baseball's Big Train by grandson of Johnson (and fellow Net54 member) Hank Thomas. I'm a Senators fan, but The Big Train was in the inaugural class of the Hall of Fame, and an obvious giant in baseball.
Fun fact - I'm fairly certain Hank also helped edit the interview recordings of Glory of Their Times - what a tie in!