Sixteen years after Ren Descartes' death in Stockholm in 1650, a pious French ambassador exhumed the remains of the controversial philosopher to transport them back to Paris. Thus began a 350-year saga that saw Descartes' bones traverse a continent, passing between kings, philosophers, poets, and painters. But as Russell Shorto shows in this deeply engaging book, Descartes' bones also played a role in some of the most momentous episodes in history,...