“Top Storey Murder” by Anthony Berkeley is a classic mystery featuring gentleman sleuth Roger Sheringham, who investigates the strangulation of a reclusive woman, Miss Adelaide Barnett, in her top-floor flat, a seemingly simple burglary gone wrong that Scotland Yard initially pursues but Sheringham finds suspect, uncovering hidden motives and secrets, including the victim's miserly habits and her niece's strange behavior, leading to a complex solution with plenty of clues and red herrings.