"Carlo Rovelli... is one of the great scientific explicators of our time. His... '... remains the world's fastest selling science book. ...The Order of Time and ' ...illuminated ...Einsteinian relativity, gravitational waves and other ...physics. ...Rovelli's gift is to bring difficult ideas down a level. His books continue a tradition of jargon-free popular scientific writing from Galileo to Darwin that disappeared in the academic specializations of the last century."