This work, titled Sahidic Coptic Course and Applications to New Testament Textual Criticism, is a comprehensive introduction to the study of Sahidic Coptic, the dialect of Coptic used in the majority of surviving early Christian texts from Egypt. Volume 1 focuses on the canonical Gospels, applying the study of Sahidic Coptic to the field of New Testament textual criticism. It explores how Sahidic manuscripts can shed light on the transmission and interpretation of the Gospels, offering insight into variations in early Christian texts. Through linguistic analysis and comparison with Greek originals, the course aims to provide students with the tools to understand how Coptic translations contribute to biblical scholarship and the history of Christian texts. Volume 2, which covers the apocryphal writings, extends this application to non-canonical texts, such as the Gospel of Thomas and other writings found in collections like the Nag Hammadi Library. This makes the series a valuable resource for scholars interested in both canonical and apocryphal Christian literature.