Her first narrative text, Onintze en el país de la democracia (1985), is a fictional account of political violence under a democratic regime.

Her parents were anarchists who considered the institution of schooling to be oppressive; accordingly, they did not enroll their daughter in formal education until the end of the Spanish Civil War in 1939.

[1] After her return from France, Forest led a women's demonstration supporting the Asturian miners' strike of 1962, and was imprisoned for a month upon refusing to pay the resulting fine.

[1] In 1974, having been approached by ETA,[3] she published a book about the assassination of Luis Carrero Blanco, then Prime Minister of Spain and confidant of the Spanish dictator Francisco Franco, (Operación Ogro) under the pseudonym Julen Agirre.

Sympathetic to the Basque terrorism, the book was one of the reasons which led to Forest being imprisoned in the same year for complicity in the Cafetería Rolando bombing in Madrid which they killed 13 innocent civilians near the Dirección General de Seguridad [es], a government department responsible for policing.

Juan María Bandrés [es], the Basque lawyer and politician who represented Forest during her imprisonment, has expressed doubt about the veracity of such allegations.

Two of her widely known works (Diario y cartas desde la cárcel, 1975 and Testimonios de lucha y resistencia, 1976) are testimonies to her experience in prison and suffering torture.

Her first attempt at narrative writing, Onintze en el país de la democracia (1985), is a fictional account of political violence under a democratic regime.