Vanishing Violin / Michael D. Bell 329 p.

The Red Blazer Girls are back with their second mystery.  Margaret, a super violinist, is offered a fab violin if she can solve the puzzles and clues.  Sister Bernadette hires the girls to find out who is sprucing up their high school.  And the RBG have to solve the crime of the stolen violin.  The violin disappears while under lock and key and security alarms.  Only a button is left at the scene.  Only later do the the RBG's discover that the two cases are related.  And of course they have to keep up their schooling and friendships and play a trick on a classmate.  Pre-teens will have fun with the interesting puzzles.