Celebrated author-illustrator and master explainer David Macaulay brings his unique voice and style to high-interest nonfiction books for newly independent readers. Everyone knows what a toilet is for, right? But what exactly happens after you flush? Where does our waste go, and how is it made safe? With his unique blend of informative text and illustration, David Macaulay takes readers on a tour of the bathroom and the sewer system, from the familiar family toilet to the mysterious municipal water treatment plant. A "Kirkus Reviews" Best Book of 2013