This well-researched and quite informative book reveals many editing and linguistic aspects about the text of Guru Granth Sahib. The author has given the exact timing, location, word formation, spellings and invocatory lines before every hymn and their location on the basis of his study of several ancient manuscripts and historical records. He has also pointed out to certain discrepancies between the SGPC publications of the text and the original "Kartarpuri Bir". His suggestions regarding proper editing of text in future are also valuable and need to be accepted. The book reflects the author's thorough knowledge of the divine text and his profound linguistic proficiency of the context and technique of the Gurbani text. The book is a good guide to the Gurmat scholars.