Katherine Rundell is the author of Rooftoppers, Cartwheeling in Thunderstorms (a Boston Globe–Horn Book Award winner), The Wolf Wilder, The Explorer, The Good Thieves, The Zebra’s Great Escape, and the #1 New York Times bestseller Impossible Creatures and its sequels. She grew up in Zimbabwe, Brussels, and London, and is currently a Fellow of All Souls College, Oxford. She begins each day with a cartwheel and believes that reading is almost exactly the same as cartwheeling: it turns the world upside down and leaves you breathless. In her spare time, she enjoys walking on tightropes and trespassing on the rooftops of Oxford colleges.

Emily Sutton was born and raised in the depths of North Yorkshire, England, and graduated from Edinburgh College of Art in 2008. She is the illustrator of the Clara Button books by Amy de la Hay and The Tale of Castle Mice by Michael Bond.