This book is a comprehensive study of selected writings ­­­of Shoghi Effendi Rabbani (1897-1957), the Guardian of the Bahá'í Faith. The author has approached Shoghi Effendi’s writings from two main perspectives: the Guardian as the divine interpreter, a man of incisive religious thought; and Shoghi Effendi the eloquent writer, a vocation that was inseparable from the sacred office as Guardian of the Faith. This book covers comprehensively five core-works of Shoghi Effendi containing valuable guidance he left for the shaping up of a new world order.The book will serve to inform not only scholars but also all those teachers, administrators, and general readers who seek a deeper understanding of these aspects of the writings of the Guardian, and who may wish to develop them in their talks or publications.