Rocio Bonilla (Barcelona,1970) is a Fine Arts graduate who, after a decade working in advertising, created ""Erase una vez" (Once Upon a Time), a project related to mural painting. She simultaneously made her debut as a book illustrator, from which came Cara de pájaro (Bird Face), her first independent picture book. This was followed by La montaña de libros más alta en el mundo (The World's Highest Book Mountain). Her third authorial project with Algar Editorial is the picture book ¿De qué color es un beso? (What colour is a kiss?). These three works have been published outside Spain, in countries such as China, Canada, United States and Belgium.