PositiveThe Boston GlobeNot since Paul de Kruif’s classic, Microbe Hunters, has this invisible world been brought so vividly to life ... Yong’s prose really sings when we walk in his shoes to meet the men and women studying microbes. Telling a story is hard when your main characters are invisible to the naked eye, so Yong hauls in scientists as proxies ... What sets this joyfully written book apart is not only its willingness to tackle complex microbial interactions but then to discuss larger ideas related to human identity, sustainability, and ecology.