David Hume is an author more and more current in our country. His work has been outstanding from the epistemological, ethical and political point of view. His great texts of philosophy of religion have long been translated. But his task of analysis and criticism of the religious phenomenon finds a more combative and direct place in the small essays he devotes to this subject and in some of his letters. The present volume of brief writings on religion includes, among others, masterpieces such as "Of Suicide" or "Of the Immortality of the Soul" (edited in Castilian already, but never so far in the context of a wide discussion on the philosophy of Religion of Hume), still unpublished essays like "Of the national characters" (in which includes a very harsh critic of the clergy and its vital restlessness) and, finally, a letter unpublished in Castilian in which David Hume shows all its fires Anticlerical and the richness of its anti-religious criticism. In his pages the reader will find a combative and radical David Hume, secular, master of secularizing thought, far from the conservative and purely skeptical image of his philosophy that has prevailed to this day in our country. The edition is completed with an extensive introductory study and an abundant body of notes made by a specialist in the field.