Sarah Wassner Flynn has authored several children's nonfiction books for National Geographic. Her most recent titles include This Book Stinks!: Gross Garbage, Rotten Rubbish, and the Science of Trash (out March 2017), Awesome 8 Extreme (out April 2017), and 1,000 Facts About the White House (out September, 2017) as well as Animal Records and Awesome 8. She has also contributed to the New York Times-bestselling National Geographic Kids Almanac for several volumes, as well as the popular Weird But True series books, including Weird But True GrossWeird But True Food, and Weird But True Christmas.

A competitive amateur triathlete, Sarah has earned All-American honors from USA Triathlon for three years in a row, placing 7th in the nation at the Olympic distance for her age-group in 2017. Also in 2017, she qualified to represent Team USA at three different World Championships (Olympic distance, 70.3, and Aquathlon) and will compete in South Africa in September, 2018 for Ironman 70.3 Worlds.  

Sarah is a frequent contributor to USA Triathlon Magazine, Triathlete Magazine, Girls' Life Magazine, and other health and fitness-focused websites and publications.

Sarah lives, writes, and trains in the suburbs of Washington, DC with her husband and three children.