MACAULAY, David with Sheila Kennan. Toilet: How It Works. illus. by David Macaulay. 32p. (My Readers Series). further reading. glossary. index. websites. Roaring Brook/David Macaulay Studio. 2013. Tr $15.99. ISBN 978-1-59643-779-1; pap. $3.99. ISBN 978-1-59643-780-7. LC 2012947300. Gr 2-5–A unique nonfiction offering that deals with human waste in a way that most other books have not. The topic of toilets could go in many directions, and this book addresses a number of them. Readers learn the biology of why people need to use a toilet, how it flushes, and where the waste ends up. Ever wonder how septic systems and sewers work? Look no further. Overall, this is an informative look at a technology that everyone uses and most people take for granted. At every step of the way, Macaulay’s engaging ink and watercolor illustrations and cutaway diagrams help to explain the text. This is a challenging read full of sophisticated and specific vocabulary, yet it is one that inquisitive youngsters and science-oriented kids will be drawn to. A boon to those looking to beef up informational offerings to meet Common Core standards.–Trina Bolfing, Westbank Libraries, Austin, TX