A journalist by profession, Mar Guerra Cid (Madrid, 1963) has lived in La Coruña since 1987. She studied journalism at the Universidad Complutense in Madrid, and has worked for various forms of media, including newspapers, information agencies and radio stations, although she is currently developing her professional career in Mastress, a working group created together with two colleagues over a decade ago. This is her first novel in Spanish, although her book 'Xenaro e o misterio da mochila verde' won the XXIII Merlin Children's Literature Prize, the most prestigious Galician-language award.