Islam is the true religion of Allah. It is important to study the stories of the Companions and the Tabaeen (Successors), because they were practical examples of Islam.
Reading the biographies of great Muslims shows us how they loved Islam and srived to spread it everwhere. They wanted all people to be Muslims, because they tasted the sweetness of Islam and want others to be like them.
The following link takes you to this noble world
Sahabiyyat

May Allah have mercy on all the Companions of the Prophet Muhammad, the Followers, and the followers of the followers till the day of Judgment