|summary=A fun snappy tale of classroom phantoms, vividly illustrated yet ruined by a bad production format that makes it much less easy to enjoy and engage with.
|cover=0340997745
|aznuk=0340997745
|aznus=0340997745
}}
You know what it's like to feel you've been in school too long. You start to look haggard, have a loping shuffle, and probably a bad smell. But many of the characters in this book take all that to an extreme, as they're ghosts long since thought vanished – plague victims, Victorian hangmen, and much, much worse. They're all there because of Mortimer Keene – the only primary school pupil smart enough to make them visible – and the only one smart enough to get rid of them too. Or is he?