The collection entitled Biblioteca Secreta (Secret Library) offers an in-depth look into what life was like in the 70s, and the essence of a time of individual and collective experimentation and learning, a time that would leave its mark on a part of society. This volume is a collection of photographs by Merce Salvador, who was a witness to the life, rehearsals and concerts of countercultural and alternative groups that appeared in the mid seventies. A period of history seen through previously unpublished or little known photos.