Not-So-Common Cents

SARAH WASSNER FLYNN is a longtime writer for National Geographic Kids, including books in the blockbuster hit Weird But True! series, and the award-winning This Book Stinks (winner of the 2017 NSTA award for Outstanding Science Trade Books for Students and the 2018 AAAS Prize for Excellence in Science Books), among others. She loves writing, running, and triathlons. When she’s not writing about races, she’s usually training or competing in one.