The work by which he is best known is the Kitab Futuh al-Buldan ("Book of the Conquests of the Lands"), edited by M. J. de Goeje as Liber expugnationis regionum (Leiden, 1870; Cairo, 1901). This work is a digest of a larger one, which is now lost. It contains an account of the early conquests of Muhammad and the early caliphs. Al-Baladhuri is said to have spared no trouble in collecting traditions, and to have visited various parts of north Syria and Mesopotamia for this purpose.
Columbia University published a translation into English in two volumes as "The Origins of the Islamic State. The first (1916) was by Philip Khuri Hitti. The second (1924) was by Francis Clark Murgotten.
The book has the form of a geographical description of the Caliphate empire in which the main information about each location is a political history of how it came to be included in the empire and some of the early political events.
- Thatcher, Griffithes Wheeler (1911). "Balādhurī". In Chisholm, Hugh. Encyclopædia Britannica (11th ed.). Cambridge University Press.
- Full English text of The origins of the Islamic state: being a translation from the Arabic, accompanied with annotations, geographic and historic notes of the Kitâb fitûh al-buldân of al-Imâm abu-l Abbâs Ahmad ibn-Jâbir al-Balâdhuri
- Full English text of The Origins Of The Islamic State Part II