Horatio Leavenworth, an immensely wealthy bachelor, is a retired merchant who enjoys great social position and respect. His two orphan nieces, Mary and Eleanor live with him in a luxurious mansion in New York's upscale Fifth Avenue. One morning, he is found mysteriously dead in his study, shot neatly through the back of his head. His will, written some time earlier, is discovered, in which he has left his entire fortune to one of the nieces, while cutting out the other completely. The building, which had remained locked throughout the night, houses a number of servants besides the two young ladies...

A perplexing mystery novel published in 1897, That Affair Next Door focuses on a mysterious murder that has occurred in a quiet neighborhood, incidentally in the house next door to the home of the curious Miss Butterworth. Consequently, the middle-aged spinster becomes directly involved in the unraveling of the gruesome crime, instigated by her inquisitive and resolute nature. The story sets into motion with the introduction of its protagonist, Miss Amelia Butterworth, an admirable woman in her fifties, who has never experienced the doubtful bliss of marriage, but nevertheless is quite contempt with her respected status in the inner circle of New York society and her comfortable home...

The country club house The Whispering Pines was closed for the winter, but only one day after he locked the place personally, the narrator sees smoke come out of the chimney. He decides to investigate and enters the house. Hidden in the dark, he sees the sister of his fiance, the girl he secretly loves, run out of the house with tears in her eyes. Upstairs then, he discovers the dead body of his betrothed... (Introduction by Carolin)