In The distinctive terminology in Sarh al-Kafiya by Radi l-Din al-'Astarabadi Beata Sheyhatovitch presents a structured and systematic study of a seminal treatise in the medieval Arabic linguistic tradition. The treatise's author, al-'Astarabadi (d. circa 1289), is widely considered the most brilliant grammarian of the later classical period. The author's analysis of his terminology reveals the extent of his originality, and of the influence that other Islamic sciences (logic, jurisprudence, theology) had on his writings.0The book is innovative in its comprehensiveness and its unique approach, which uses texts from various medieval Islamic disciplines in clarifying the terminology. It provides scholars and ordinary readers with tools for a deeper understanding of al-'Astarabadi as well as other medieval Arab grammarians.