Descartes's Secret Notebook by Amir D. Aczel

A True Tale of Mathematics, Mysticism, and the Quest to Understand the Universe

A historical-detective narrative that interweaves the life and travels of a 17th-century philosopher-mathematician with an investigation into a rumored clandestine notebook, exploring his breakthroughs in analytic geometry, optics, and physics alongside entanglements with mysticism, alchemy, and secret societies, personal dramas like the loss of his daughter and the legend of an automaton, and how these threads converge in the private ideas that helped ignite the scientific revolution.

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