With the review of this book I would like to return to a tradition that our journal Anales de Teología has had since the first decade of this century. It is about contributing to the ecumenical dialogue by spreading the self-understanding of Pentecostalism present in our region. Moved by a double reason, the majority of Christians who are not Catholics of the Great Conception are Pentecostals and because there is no complete ecumenism if this movement is not integrated, or at least attempted, into ecumenical dialogue.