I greatly enjoyed former umpire Ron Luciano's books. I think he had three or four. The titles I remember are THe Umpire Strikes Back, Strike Two, and Fall of the Roman Umpire. They aren't necessarily about how to be an umpire, but are stories about his experiences as an umpire in the sixties and seventies (maybe early eighties as well, can't remember). They were very fun to read and absolutely hilariouse. He was very witty. Thanks, I'll pass that along to her.