The book, published by Red Eléctrica, presents the results of the archaeological dig completed around Sequer of Sant Bernat, which, according to tradition, is the place where the three siblings Bernat, María and Gracia were made martyrs in 1180 for converting to Christianity.

Red Eléctrica sets out its committment to biodiversity in its environmental policy, biodiversity strategy and the many actions it carries out in this area, to which it dedicates considerable manpower and financial resources.