Libby VanderPloeg is an artist and illustrator living in west Michigan. 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.

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 non-fiction 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 with his family.