"The Book of the Ecumenical Church of Scotland", authored by ministers and commissioners of churches from different regions of the country, is a unique document of the religious history of Scotland. It carefully and systematically highlights the main themes and conclusions that were discussed and approved by the spiritual leaders. The book contains important decisions and structured provisions of the Church that reflect its inner life and organization. Thanks to this edition, the reader can better understand and appreciate the socio-cultural context of the development of Christianity in Scotland in the past. The book became an important source for research and analysis of reformation processes in this country in the 16th century, as well as for studying the influence of church institutions on social transformations of that time.