Al-Isābah fī Tamyīz al-Ṣaḥābah is one of the most celebrated classical works on the biographies of the Companions of the Prophet Muhammad (pbuh), authored by Ibn Hajar al-Asqalani. This English translation makes this monumental reference work accessible to contemporary readers while preserving the structure, scholarship, and content of the original text.

Spanning multiple volumes, the series contains biographical entries on thousands of individuals connected to the era of the Prophet (pbuh). In addition to recording their lives, narrations, family relationships, and historical roles, Ibn Hajar carefully examines the evidence for whether a person should be regarded as a Companion. The work addresses complex and often disputed cases, distinguishing those who met, heard, or believed in the Prophet (pbuh), from those who did not fulfill the criteria of companionship.

Among the subjects discussed are notable figures whose status has been debated by scholars, including al-Najāshī, Uways al-Qaranī, al-Khaḍir, Prophet ʿĪsā (Jesus) (pbuh), and even the jinn who listened to the Qur'an. Through a meticulous analysis of the classical sources, Ibn Hajar evaluates the reports relating to each case and clarifies their proper classification.

Each volume covers a specific range of entries and forms part of a comprehensive translation of the complete work. This edition is presented for students, researchers, and readers seeking access to one of the most important reference works in Islamic biographical literature and the study of the Companions of the Prophet (pbuh).