Rocio Bonilla (Barcelona, 1970) has a degree in Fine Arts and created Érase una vez (Once Upon A TIme) a mural project after more than a decade working in advertising. She later began illustrating books and her first publication was 'Cara de pájaro' ('Bird Face'), a solo project. Eulàlia Canal (Granollers, Vallès Oriental, 6th March 1963) is a psychologist by training and the author of children's books which are notable for their tenderness, richness of language and poetic touches.