Just Finished Reading They Do It with Mirrors by Agatha Christie

They Do It with Mirrors (alternate title Murder with Mirrors) is a 1952 murder mystery novel by the late, prolific writer Agatha Christie.  It's the seventh book of hers I've read so far and only the first featuring the elderly English amateur sleuth Miss Marple...all but one of the others have spotlighted Belgian detective Hercule Poirot.  Miss Marple meets up with an old school friend, Ruth Van Rydock, who tells her of her concern about her younger sister Carrie Louise Serrocold and the goings on at her family estate back in England...and wouldn't she as a personal favor visit and stay with them a while to see if she can discern what the matter is.  Upon arriving, Miss Marple discovers many family members around, as well as a school for juvenile delinquents...run by Carrie's third husband Lewis.  Carrie Louise has married three times and has an eternally optimistic personality, attractive to all.  Yet it appears that someone is trying to poison her...and what's going on with Lewis' young stuffy assistant Edgar Lawson, who appears to have become dramatically more resentful and paranoid?  Then there is young, pretty and flirtatious Gina, Carrie Louise's granddaughter visiting with her unhappy American husband Walter Hudd and who has attracted the affection of Steven, son of her second husband (the family relationships here are very convoluted). But when Christian Gulbrandson, the son of Carrie Louise's first husband and who is in charge of administering that family's vast wealth, visits with intense concern about her state of health, the tipping point is reached and finally...well into the novel...the expected murder occurs.  Just about everybody at the estate could be a suspect, but going on only what the author mentioned specifically just before the act, I realized very early on who the guilty party was.  Still, I enjoyed the book and recommend it.  Agatha Christie has written so many mystery novels that I could simply focus on her collected works and it would occupy me for years...