MAR FERRERO studied Fine Arts in Madrid. She first worked in animation but soon became a children's illustrator. Some of her clients include Ed. Edelvives, Ed. Santillana, Ed. SM, Ed. Bruno, Ed. Siruela, Ed. Alba, Blanco y Negro, APM, INJUVE, Guia del Nino magazine, Hachette, Bayard, Fundacion Mapfre, and Mirarte. She has also written and illustrated two children's picture books: Lo mejor del mundo, Ed. Pearson and Lo que no vio Caperucita roja, de. Edelvives. She has showcased her paintings in several exhibitions around the world. She lives in the mountains near Madrid with her family and animals: nine hens, one rooster, one very big dog, six fish, and lots of spiders in the walls and ceilings.