Beware Your Neighbour, first published in 1951, is book no. 43 in the series of British mysteries featuring Inspector Henry Arnold and his friend Desmond Merrion by Miles Burton (a pen-name for prolific author Cecil Street [1884-1964]). The novel centers on the residents of a single street of a small English town; mistrust and suspicion grow when a series of strange warnings are received by the residents. The messages of death escalate into a number of dangerous pranks, and Desmond Merrion, friend of one of the victims, is asked to investigate. Following the murder of a couple in one of the street's houses, Merrion's long-time associate, Inspector Arnold of Scotland Yard, is also called in to solve the mystery and catch the killer.