There is a special horror in hearing a mind unravel from the inside. In The Diary of a Madman, Guy de Maupassant pulls us into the private writings of a man who can no longer trust his own thoughts. His diary entries begin quietly enough—simple observations, small disturbances—until each page edges closer to something darker, something unmoored, something deeply and intimately wrong.

This is the slow, suffocating terror of a mind turning against itself.

Guy de Maupassant, one of France’s great masters of psychological horror, wrote with an uncanny instinct for the fractures that hide beneath ordinary life. His stories rarely rely on monsters or myth—only on the terrible things people can do, think, or become.

If you enjoyed this tale, explore more shadows and unsettling corners in the Short Storyverses collection at shortstoryverses.com.

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