The Whistle Blower - Wing and a Prayer Mysteries, #1

Bad guys. beware: There's a soccer mom on your trail.   Work-at-home-mom Sandra's life is a whirlwind of activity. So, why's she so bored? When a referee drops dead during her son's soccer game, and a short man claiming to be an angel asks her to help investigate--suddenly, her life's not such a routine. The angel (is he really an angel?) tells her to go undercover as a soccer referee, which, of course, is ridiculous.
She hasn't run anywhere since high school. But Sandra will find out she is still capable of far more than she thought--with a little help from above. (This is the first book in the Wing and a Prayer Cozy Mystery Series.)