It is well-known that every movement for the reformation of mankind thrives and progresses with the help of the sacrifices of its leaders, followers and adherentSayyidIndeed, the importance of hard striving for the cause and the offer of sacrifices for it seems to be the very core of belief. The lives and biographies of these luminaries of Islam deserve close study as they are apt to infuse the same spirit of fortitude and sacrifice for the cause of our great religion in our hearts also. The opening Chapter of the volume seeks to show that the Shias existed from the days of the Holy Prophet (s.a.w.a.) and are not a product of any later period as is sometimes alleged. The subsequent chapters contain very brief accounts of the services of the Early Heroes of Islam, that is, those of the lifetime of the Holy Prophet (s.a.w.a.), followed by similar accounts of his distinguished companions and the distinguished companions of the various Imams (a.s.), and grouped under the name of the Holy Imam with whom each was associated.