"Bilal of Africa and Other African Companions of the Holy Prophet" by Husayn Malika Ashtiyani highlights the significant contributions and sacrifices of African companions of the Holy Prophet Muhammad (PBUH). The book focuses on Bilal ibn Rabah, renowned for his steadfast faith and role as the first muezzin, along with other companions who played crucial roles in the early Islamic community. Through their stories, the author emphasizes themes of equality, devotion, and the rich cultural diversity within the early Muslim Ummah.