There are musical goings-on at Ghastly-Gorm Hall and another spooky mystery for Ada Goth to solve in the fourth book in the Goth Girl series by Chris Riddell, Children's Laureate 2015-2017. Lord Goth is throwing a music festival at Ghastly-Gorm Hall, with performances from the finest composers in the land. Ada can't wait, but it's quite distracting when her grandmother is trying to find her father a fashionable new wife, there's a faun living in her wardrobe and Maltravers is up to his old tricks. Ada must make sure everything goes to plan, and luckily help is at hand from a very interesting house guest...