`A fascinating study of the intertwined lives of microbes and humans, `10% Human', is a manual for the new, healthy way of being dirty ... Read it, and you will learn to love your microbiota' Newsweek `A welcome antidote to the simplistic boost your health with probiotics books and articles posing as science (but serving mostly commerce), Collen dares to tell the messy truth about what science knows - and doesn't know - about the microbes that live in us, live with us, and in some ways even become us ... [Collen] is clearly an expert in the field ... fascinating ... Everything you wanted to know about microbes but were afraid to ask' Kirkus, *Starred* Review