Huginn Þór Grétarsson was born in 1978 in Akureyri, Iceland. He studied economics and financial management and worked as a stockbroker. From an early age he was very creative, making his own games and books. As a young boy, he lived for two years in Denmark before returning to Iceland and settling in Reykjavik. He started writing children's books about sharks and a powerful pizzaman for his younger brother. As a teenager he wrote poems, and when he started travelling around the world he kept a blog. In 2006 he published a travel journal about his trip to South America. Since then, he has written and translated more than 200 books, mostly for children and teenagers.

He has also written a successful series of light-reading books. Every year, some of his books are reprinted to meet demand, and several have grown wings and flown abroad to new markets. Rosaria Battiloro was born in Naples, Italy, in 1984. She started drawing when she was a little girl, and loved reproducing characters from her favourite cartoon and fairy books. She studied at the Fine Arts College in Naples, then specialized in illustration at the Italian School of Comics in Naples. Rosaria is a freelance illustrator, and her work has been included in several collective exhibitions in Italy. Her inspiration comes from almost everything that is involved in modern pop-culture, including music, photography, magazine art, fashion, books, cinema, and advertisements. Her primary goal is to make something beautiful, but not in a calm and secure way, but rather with a raw and intense passion.