When renowned scientist Isaac Newton took up the post of Warden of His Majesty's Mint in London, another kind of genius--a preternaturally gifted counterfeiter named William Chaloner--had already taken up residence in the city, rising quickly in an unruly, competitive underworld. In the courts and streets of London, and amid the tremors of a world being transformed by ideas Newton himself had set in motion, Chaloner crosses paths with the formidable new warden. An epic game of cat and mouse ensues in Newton and the Counterfeiter, revealing for the first time that Newton was not only one of the greatest minds of his age, but also a remarkably intrepid investigator.