Sam Hay is the author of over thirty books for children including Spy Penguins, the Undead Pets series, and the Stella and the Night Sprites series. Raised in Scotland and trained as a journalist in Edinburgh, Sam became a full-time writer when her first baby was born and now lives in Wales with her husband and two children. Marek Jagucki is a graduate of Falmouth School of Art and Design. He is a full-time illustrator and graphic designer based in Yorkshire, UK.