Song of the damned

"When Phineas Fox is asked to help with the music for bicentenary celebrations at Cresacre Abbey School, he does not expect to find fragments of a sinister medieval ritual within a locally-written opera. As Phin follows the threads of the past, he discovers that curious legends about the school's history still linger, including the fate of a group of nuns who disappeared without trace more than 200 years before. What exactily happened to them? And who is the mysterious Ginevra, the shadowy figure whose true identity has never been known? As he delves further, Phin begins to unravel a series of interlocking secrets, each one more puzzling--and sinister than the last."--Provide by publisher