There was a danger that by the fifth of his Hawthorne mysteries that started with The Word is Murder , Anthony Horowitz would have stretched the unusual format too far. The other books were written in the first person, with a fictional version of Horowitz himself acting effectively as Watson to eccentric ex-cop Daniel Hawthorne. But this entry in the series starts in the conventional third person, describing the occupants of an exclusive close in Richmond on Thames and their fractious relationships with a boorish man who it feels is surely going to be the murder victim. The setting is clever, because the small gated development effectively provides a similarly isolated group of suspects to a traditional country house murder mystery, but better suited to a modern world. And we get a classic varied group of suspects from a chess grandmaster and a 'dentist to the stars' to a pair of old ladies. But Horowitz then comes into the story as this was a past case of Hawthorne’s that Hor...