There are several literary traditions of composition in every literature of the world, such as biographies, ballads, plays, epics essays etc. In Punjabi literature there is a distinct "Janamsakhi" (Genealogy-cum-Biography) tradition especially related to the life and teachings of Guru Nanak. So far five "Janamsakhis" have been found. All these Janamsakhis have been written by different persons after the compilation of Guru Granth Sahib in 1604. These Janamsakhis differ in their stance, factual description and selection of incidents from the life of Guru Nanak. In the present book, the author has traced the history of Janamsakhi tradition as well as presented each incident in Guru Nanak's life from the different perspectives of the available five Janamsakhis. The author has also given information about Guru Nanak's long travels, the contemporary modes of travel, chronological account of his travel routes, the names of places he visited and persons he met and his interaction with them. The author has done a critical analysis of each episode and given his comments about their description in each version. In this respect, it is the first comprehensive study of all the Janamsakhis together and highlights their relevance in Sikh history.