Heidi Elisabet Yolen Stemple is the author of more than thirty books for children, some of which she coauthored with her mother, Jane Yolen, including Not All Princesses Dress in Pink. Heidi lives in Hatfield, Massachusetts.

Teresa Bellón born in Albacete, Spain. After completing an illustration course in Madrid, she began working for national and international clients and she has had several exhibitions of her work. Teresa’s inspirations are mainly Portuguese and Nordic children’s book illustrators. Her drawings have limited color ranges and simple compositions. In her free time, Teresa travels, buys illustrated books, and walks around Madrid.