A groundbreaking book which explores the world of the powerful microbes that make up 90% of the human body. Modern epidemics of obesity, mental health problems, gut disorders, allergies and even cancer have their root in our failure to cherish our personal colony of microbes. Antibiotics, antibacterial cleaners, changing diets and our obsession with hygiene have harmed our microbe communities, but we can change our microbes for the better. *Also appeared in March Buyer's Notes*