The "library" of Nag Hammadi, found incidentally in 1945, constitutes, together with the Qumran manuscripts, the greatest discovery of ancient texts of the Modern Era. Most of the texts found in the thirteen books that comprise this library are Gnostics. Today it is known that gnosis and gnosticism constitute the nucleus of one of the ideological phenomena that dominated the religious and philosophical thought of the Mediterranean basin during the centuries I to IV of our era.
   The texts of Nag Hammadi shed an important light to increase our knowledge not only on Gnosticism but on several areas and epochs: the world of philosophical and religious speculation (Jewish, Christian and pagan) in the Greek language from the 1st to 4th centuries, and the scope of Egyptian culture, Coptic, of the fourth century, in which varied interests existed, not only Gnostics, but also hermetic, Christian and Manichean.
   This work presents the first complete version of these manuscripts on the original texts, following the best critical editions of the Coptic text. In addition to the general introduction to the gnosis with which the first volume starts, in the three volumes included in the series each text is accompanied by a brief introduction and informative notes that clarify their understanding difficulties.
   This second volume contains the texts that most closely approximate the New Testament. The gospels are complemented with revelation discourses of Jesus before the ascension. Of special importance is the Gospel of Thomas, whose material is considered by some researchers as previous or parallel to the synoptic gospels.