This book presents to children, as well as to adults, 30 saints from yesterday and today who stand out for their friendship with Jesus: Augustine, Dominic, Francis, Catherine, Ignatius, John of God, Francis Xavier, John Bosco, Damian of Molokai, Teresa of Lisieux, John XXIII, Teresa of Calcutta, Father Patera, Pablo Domínguez or Pope Francis himself, among others. For each saint, the book offers a brief overview of who he or she is, a notable scene from his or her life, a biblical quote, a small sample of his or her thought, several questions that help to reflect on the saint's testimony and a prayer, all narrated in simple and enjoyable language and accompanied by the charming and colorful illustrations of Patxi and Poe. The book is an excellent aid for catechesis, to illustrate a religion class, or as a reading to approach holiness in a novel and enjoyable way.