"Mus‘ab Al-Khair" is an inspiring biography of Mus‘ab ibn Umayr (RA), one of the earliest and most devoted companions of Prophet Muhammad (PBUH). Once a wealthy and privileged young man in Makkah, Mus‘ab sacrificed his luxurious lifestyle to embrace Islam and became one of its earliest defenders. He played a pivotal role in spreading Islam in Madinah, becoming the first ambassador of Islam and laying the foundation for the Prophet’s migration (Hijrah). His courage, humility, and dedication to the faith made him a symbol of sacrifice and righteousness. This book highlights his journey from privilege to devotion, his role in early Islamic history, and his ultimate martyrdom in the Battle of Uhud, where he gave his life in service to Allah (SWT).