This is a Miss Jane Marple Mystery first published in 1952.
Agatha Christie created Miss Jane Marple in her first crime story The Murder in the Vicarage published in 1930. Since then, Agatha Christie had written thirteen books with Miss Jane Marple as the crime solver. Miss Marple was English, white-haired and a sweet old lady. Based on the few books I read of her, she came across as one who was friendly and could speak to people easily. Miss Marple had a knack to crack the mysteries of murders when the police could not.
In They do it with Mirrors, I was curious with the title of the book. It was an interesting title. I was wondering how a murder could be done with the use of mirrors. Gun shots were heard coming from a locked study room by all present in the great hall connecting to the study. No one died in the study room. Instead a family visitor was shot dead in the guest room at the other end of the floor. This was the backdrop for investigation by the police.
Who had the opportunity to kill and for what motive? It was an Aha for me when I came towards the last few chapters of the book. I was not disappointed and Miss Marple had my admiration for her brain and insight.