Kathryn & Ross Petras are a sister-and-brother writing team and authors of many word-oriented books like the New York Times bestseller You're Saying It Wrong, THAT DOESN'T MEAN WHAT YOU THINK IT MEANS, as well as Very Bad Poetry and Wretched Writing. They've also compiled a series of bestselling quote books like Age Doesn't Matter Unless You're a Cheese and It Always Seems Impossible Until It's Done, as well as the page-a-day calendar The 365 Stupidest Things Ever Said (now in its 24th year – with over 4.8 million copies sold) and its counterpart The 365 Smartest Things Ever Said. They also do a podcast with NPR's KMUW called You're Saying It Wrong. Their latest book, A History of the World Through Body Parts, is now available.