Murder at the Vicarage is a detective novel by Agatha Christie, first published in 1930. This book marks the debut of Miss Marple, one of the writer's main characters alongside Hercule Poirot. The book follows the murder of Colonel Lucius Protheroe who has been shot through the back of his head while he is in the vicar's study. Both his wife's secret lover and his wife separately confess that they're the one who did it, but the evidence shows that they're innocent. Miss Marple then decides to use her study of human nature to find the real murderer among her neighbors.
There's so much to love about this book. First, as always, the characters. While being the less dominant character in the story, Miss Marple has a prominent presence throughout the plot even though she is not a detective of some sort. Her philosophy of human nature is an interesting one. One that becomes the main utility in the revelation of the culprit. Other supporting characters are great as well.
And then the twists. They're evenly placed here and there to misdirect the readers from the actual crime, and most of them are revealed at the very end of the book, as usual.