"An Act, Declaration, and Testimony of the Universal Bond of our Covenant Reformation, as Achieved and Established in Great Britain and Ireland; Especially Between the Years 1638 and 1649, Inclusive" was written by the Reformed Presbytery of North America. This work is an important historical document that reveals the events of the Scottish Covenanter movement and the Irish Reformation between 1638 and 1649. The book details important events, acts, declarations, and testimonies related to the Covenant Reformation of the time. The authors analyze in detail the ideas, values and struggle for faith that took place on the territory of Britain and Ireland during the specified historical period. This book is an important source for those studying the history of religious movements, covenantal theology, and socio-political transformations in seventeenth-century Scotland and Ireland. The authors try to shed light on the key events of this period and reveal the significance of the covenant movement for the further development of religious thought and society in this part of Europe.