Ibn Juljul's major book is Ṭabaqāt al-aṭibbā’ w’al-hukamā’ (Generations of physicians and Wise Men, Arabic: طبقات الأطباء والحكماء) which is an important work on the history of medicine using both Eastern and Western sources.
[3] The book includes 57 biographies of famous Greek, Islamic, African, and Spanish physicians and philosophers, and contains interesting information on the earliest accounts of Syriac translations into Arabic.
[2] The included biographies of contemporary Spanish physicians are notable because they give a clear insight about life in Cordoba during the 10th century.
[4] Composed in 377/987, the Ṭabaqāt is considered to be the second oldest collection of biographies of physicians written in Arabic; the earliest being Taʾrīkh al-aṭibbāʾ by Ishaq ibn Hunayn.
[5] The Ṭabaqāt also records some of Ibn Juljul's thoughts on the decline of science in the Eastern Islamic provinces.