The Light Ages

The Light Ages, by Seb Falk (Norton). The figure at the heart of this exploration of medieval astronomers, philosophers, and physicians is John of Westwyk, a brilliant fourteenth-century Benedictine monk who created an equatorium, a kind of analog computer for determining the positions of the planets. As John passes in and out of the historical record, Falk provides an expansive survey of Eastern polymaths, squabbling theorists, political schemers, and optimistic overreachers. Those dreamers can be the most beguiling: the eleventh-century monk Eilmer of Malmesbury leaped from an abbey tower with wings attached to his hands and feet, flying two hundred metres before plunging to earth. Falk, always generous, applauds him for having “piloted an experimental glider, not wholly without success.” The New Yorker