For many years Juan Kruz Igerabide Sarasola (Aduna, Guipúzcoa,1956) was a teacher, in primary and secondary schools, and later, at the País Vasco University specialising in Basque Language studies.

Juan Luis Arsuaga (Madrid, 1954) is Professor of Palaeontology at the Complutense University of Madrid, director of the Centre for Human Evolution and Behaviour (UCM-ISCIII) and co-director of the Atapuerca Research Team.

Juan Luis Iglesias: Comic writer. Has published "50 years is nothing" (Dibbuks) and "Flies and Dragons" (Drakul). He has participated in the anthologies "Visions of the End" (Aleta) and "Dark Hearts" (Nowevolution).

Juan Madrid was born in Malaga in 1947. After graduating from the Universidad de Salamanca, with a degree in Modern History, Juan Madrid worked as an investigative reporter and columnist, a field in which he has earned distinction.

Juan Ramón Barat (Valencia, 1959) works across all literary genres and has been the recipient of various prizes and awards as a poet, dramatist and fiction author.

Juan Tallón (Vilardevós, Ourense, 1975) is a graduate in Philosophy and a journalist who has collaborated in such media outlets as El Progreso, El País, Jot Down and Cadena SER.

Juan Tallón (Vilardevós, Ourense, 1975) is a graduate in Philosophy and a journalist who has collaborated in such media outlets as El Progreso, El País, Jot Down and Cadena SER.

Juan Trejo (Barcelona, 1970) graduated in Hispanic Philology from the University of Barcelona, he was a member of the editorial team of the magazine Lateral and co-director of the literary magazine Quimera from 2006 to 2009.

Juan Vilà was born in Madrid in 1972. He studied Philosophy but makes a living as a journalist, writing and working for all types of media.