Symphony of Secrets by Sharon Hinck

Stand alone novel

Summary: 

Talented flutist Amy Johnson's dreams come true when she wins a spot with the Minneapolis Symphony. But this amateur sleuth has trouble concentrating on the notes as she begins to see devious motives behind her fellow musicians' many mishaps.

Meanwhile, her musically talented teenage daughter wants to give it all up for - gasp - the cheerleading squad. What's a musical mom to do?

Can Amy fine-tune her investigation before the symphony is forced to close and she loses not only her dream job but her promising new relationship with the conductor?

Opening Lines: 

On Monday, I uncovered a drug ring in South Minneapolis. On Tuesday, I spotted a felony theft at a country club in Edina. On Wednesday, I overheard plans for industrial espionage while staking out the back room of a workshop in St. Paul. 

On Thursday, my daughter blew all my cases out of the water. 

No, my daughter isn't a defense attorney; she's a hopelessly practical girl with no imagination.