The companions of the Prophet Muhammad (P.B.U.H) were among the most important, honest, courageous and pious people in the whole world and they emulated the Prophet Muhammad (P.B.U.H) in every aspect. Therefore, they are a bright guide for the whole Muslim Ummah. In this great work, the author has compiled the life history of 18 greatest companions of the Prophet (P.B.U.H). Through this work, the young generations will be introduced to the lives of these great companions and they will be inspired to emulate them in their love of the Prophet Muhammad (P.B.U.H) and the Lord of all the Worlds, Allah S.W.T.