Inhalt: A brilliantly fun and spooky middle grade adventure! Billy, who lives in the town of Stony Brook, is having a miserable summer. Firstly, she's having a fight with her best friend, Dev. Secondly, it looks like her mums might have to sell their antique shop. And thirdly and perhaps worst of all, her goldfish Hepzibah has died (she killed it). But when Billy happens across some unusual spectacles through which she can not only see but hear ghosts – things take a spectral turn. The ghosts are worried: at night a strange, masked man with a vacuum-like machine stalks the streets of Stony Brook, using a mist to lull ghosts to sleep and suck them up like bits of fluff. Where they go, no one knows, but it's up to Billy and her unlikely new friend Dorothy to solve the mystery of the terrifying masked villain whom the ghosts all call: Dr. Dust.