Stefan Buijsman (b. 1995) gained a master's degree in philosophy in Leiden at the age of eighteen, after which he moved to Sweden to work on a PhD. Within eighteen months, instead of the usual four years, he gained his doctorate, making him one of the youngest ever PhDs. He is currently studying the philosophy of mathematics as a postdoctoral researcher.
"An illuminating history of mathematics that also touches on fascinating philosophical questions surrounding math...Buijsman's enjoyable survey makes a convincing argument that understanding these basics will provide the tools necessary to better evaluate the modern world's information onslaught." --Publisher's Weekly