Career as Depicted in Popular (or Unpopular) Culture
Some sportscasters have written books and although they aren't about announcing per se, there is still a lot to be learned from reading them.
Read:
Roadside Baseball by Chris Epting and Joe Buck
You Can’t Make This Up by Al Michaels
Any of John Madden's three books
Fair Ball by Bob Costas
See:
Any sports movie ever made