Rose George thinks, researches, writes and talks about the hidden, the undiscussed. Among the everyone-does-it-no-one-talks-about-it issues she's explored in books and articles: sanitation (and poop in general). Diarrhea is a weapon of mass destruction, says the UK-based journalist and author, and a lack of access to toilets is at the root of our biggest public health crisis. In 2012, two out of five of the world’s population had nowhere sanitary to go.

The key to turning around this problem, says George: Let’s drop the pretense of “water-related diseases” and call out the cause of myriad afflictions around the world as what they are -- “poop-related diseases” that are preventable with a basic toilet. George explores the problem in her book The Big Necessity: The Unmentionable World of Human Waste and Why It Matters and in a fabulous special issue of Colors magazine called "Shit: A Survival Guide." Read a sample chapter of The Big Necessity >>

Her latest book, on an equally hidden world that touches almost everything we do, is Ninety Percent of Everything: Inside Shipping, the Invisible Industry That Puts Clothes on Your Back, Gas in Your Car, Food on Your Plate. Read a review >>

In the UK and elsewhere, you'll find the book titled Deep Sea and Foreign Going: Inside Shipping, the Invisible Industry the Brings You 90% of Everything.