"The Case of the Haunted Swamp" by Cliff MacGillivray and Kelly Ward, illustrated by Phil Mendez
Legend has it that Mozart wrote his "Perfect Symphony" using gold ink. But as soon as the ink had dried, the notes magically came alive and flew right off the page, scattering themselves across the world. Over two hundred and twenty years later, the grizzly bear musical philanthropist, Lionel T. Hollingsworth wants to capture them and return them to the empty sheet music. He's hired the famous mouse detective, and musical genius, T. W. Strouse to find them, and he thinks the first ones are haunting his own old homestead on the bayou in Louisiana. This is the first in the series of "Note Hunter" children's books, "The Case of the Haunted Swamp" by Cliff MacGillivray and Kelly Ward.