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"The archetypal link between dirt and guilt, and cleanliness and innocence is built into our language," says journalist Katherine Ashenburg. But Dr. Mary Ruebush counters that with the fact that Western civilization's obsession with antibacterial soaps and our quest to be clean all the time is actually making us sick. Why Dirt is Good is a fun look at the plus side of dirt and germs. Complete with cartoons, the book features irreverant yet medically sound advice that illustrates how we can become healthier by exposing ourselves to a bit of dirt and germs. Divided into four parts, the book will explore through text and cartoons: Part 1 Dirt = good, antibiotics = bad Part 2 How your immune system really works How the immune system develops in children Part 3 What a germ or bug is trying to do to prolong its life in the presence of antibacterials and antibiotics Part 4 What you can do to make your immune system healthier