Alan Katz is the author of many highly acclaimed children's books, including Take Me Out of the Bathtub and Other Silly Dilly Songs, Don't Say That Word! OOPS!, Poems I Wrote When No One Was Looking, and The Day the Mustache Took Over and its sequel, The Day the Mustache Came Back. Alan is also a six-time Emmy-nominated writer for TV series including The Rosie O'Donnell Show, animated series Taz-Mania, Disney's Raw Toonage and Goof Troop, the Grammy Awards and Tony Awards, and many network specials and game shows. he has also created comic books, trading card sets, web videos, TV commercials and hundreds of other special projects for kids and parents. He lives with his family in Fairfield County, Connecticut.

Alex Willan the author and illustrator of Unicorns are the Worst and the Jasper & Ollie series. He grew up in Louisville, Kentucky, where he was seldom seen without his sketchbook in hand. His love of drawing led him to earn a BFA in illustration from Savannah College of Art and Design. Alex has exhibited in art galleries and has painted murals, theater sets, and squirmy kids' faces, but his true love has always been children's books. He lives in Chicago with his dog, Harley.