Sister Boniface Mysteries

Sister Boniface is called by DI Gillespie to the home of minister of defence Charles Streatham, where guest Mary Sparkes has been found dead at the bottom of a staircase. Quickly assessing Sparkes has been murdered by poisoning rather than by a fall, Gillespie and DS Livingstone have to identify the murderer among the persons in the house - one is reporter Ruth Penny, disguised as a maid and looking for a scoop.