The Scarlet Citadel by Robert E. Howard

In this thrilling tale of sword and sorcery, the formidable King Conan of Aquilonia finds himself ensnared in a treacherous plot orchestrated by the malevolent sorcerer Tsotha-lanti. Stripped of his power and imprisoned in the dark, labyrinthine dungeons of the Scarlet Citadel, Conan must rely on his indomitable will and unparalleled combat skills to escape. As he battles monstrous creatures and navigates the sinister corridors of the citadel, Conan's journey is one of resilience and cunning, culminating in a fierce confrontation that tests the limits of his strength and determination.