Dav Pilkey has written and illustrated numerous popular, award-winning books for children, including the Captain Underpants and Dumb Bunnies series; DOG BREATH, winner of the California Young Reader Medal; and THE PAPERBOY, a Caldecott Honor Book. He lives with his wife in the Pacific Northwest. Visit him online at www.pilkey.com. Dan Santat wrote and illustrated the graphic novel SIDEKICKS, and has also illustrated many acclaimed picture books, including the New York Times bestseller BECAUSE I'M YOUR DAD by Ahmet Zappa. He lives in Alhambra, California, with his family. Please visit his website at www.dantat.com.