Author: Muhammad ibn Ishaq ibn Yasar ibn Khiyar
The most earliest biography of Prophet Muhammad (peace be upon him), written by Ibn Ishaq about 200 years after Muhammad's (peace be upon him) death.
WARNING: There are some things written in this book which have no source while other things written are based on weak sources (i.e. weak Hadiths). The book gives the sources, and other times doesn't provides sources. Other scholars (i.e. Ibn Hisham) who came after Ibn Ishaq analysed some of the material written in this book based on historical sources we have, and claimed the weak sources in his book to have no authentic claimed proof. However, this book can be used as reference whenever it is required.