The problem with books about the All-Star Game is that unless it concentrates on one specific contest or the origins of the Midsummer Classic, it will be out-of-date as soon as the next one rolls along.
- The Midsummer Classic: The Complete History of Baseball’s All-Star Game
- Baseball’s All-Star Game: A Game-by-Game Guide
- Baseball’s All-Star Game Reference Guide 1933-2007: 78 Games in 74 Years
- All-Star Baseball Since 1933
- The Day All the Stars Came Out: Major League Baseball’s First All-Star Game, 1933
There are, of course, hundreds of books about individual players or lists of “All-Stars.”
And, in a bit of shameless self-promotion: I wrote an article, “All Star Games at Home: How Hometown Heroes Fare,” which appeared in the 1996 issue of Baseball Research Journal, published by SABR. Of course, the piece is out-of-date, leaving off with the 1995 ASG in Arlington, Texas. I know it’s available from the organization’s website, but not sure if it’s for members-only.