Al-Khwarizmi
Algebra and the Art of Calculation
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Crowns, crusades, and conquest
Charlemagne crowned on Christmas Day, Genghis Khan burning cities into silence, Joan of Arc riding through the Loire in armor nobody had forged for a girl. The medieval centuries look dark only from a distance — up close, they are a thousand years of cathedrals, caliphates, and competing visions of God. First-person biographies of the rulers, mystics, and outsiders who shaped a world held together by faith and the sword.
Algebra and the Art of Calculation
The Woman Who Invented the Author
The Lion Who Founded an Empire
The Earth-Shaker Who Built an Empire
The Man Who Reclaimed the Infinite