Tracey Turner has written lots of books for children, including How Many Mice Make an Elephant, The Curious Book of Lists, Exploding Beetles and Inflatable Fish, and more than 80 other titles. Her work has been published in over 20 languages and many of her books have gone on to become best-sellers. She lives in Bath, in southwest England with Tom and their son, Toby, and Wellington the dog.

Andrew Donkin has sold over 10 million children's books and graphic novels, worldwide. His graphic novel, Illegal (co-written with Eoin Colfer), was an international bestseller and has won or been nominated for over 40 book awards. Andrew has written for many global franchises, including Batman, Superman, Doctor Who, and Artemis Fowl. His nonfiction work includes biographies of Roald Dahl, William Shakespeare, and Albert Einstein. He loves books, comics, and tea. Andrew lives near the River Thames in London, England with his family.

Libby VanderPloeg is an artist and illustrator. She always loved drawing and, growing up, was surrounded by books and stories, as her mother was a storyteller and children's librarian. On family road trips, she'd study the big atlases as they trekked from state to state, fascinated by all of the layers of information and iconography. After studying fine art in Chicago and working as a graphic designer, art director, and even a cheese monger in Brooklyn, she decided to focus on her lifelong love of drawing and illustration.Her obsession with maps resurfaced, now through her illustration work, drawing dozens of colorful cities across the globe. She lives in western Michigan.