'Someone needs to answer strange questions. And it could be me. Why not? I could be a detective ...' No mystery is too creepy for twelve-year-old Ditta. So when she discovers a lonely ghost haunting an ancient book at school she's determined to figure out where he's come from and what secrets lurk in his past. Ditta, her best friend Max and her computer geek sister Mirabel are going to uncover the truth together. The hidden truth about all sorts of portable ghosts...