The Characteristics Book is one of the most famous books written on the philology, philosophy and secrets of Arabic

The Book of Characteristics (The Book of Characteristics) is one of the most famous books written on jurisprudence and philosophy, the secrets and facts of Arabic, and was authored by "Abi al-Fath Othman bin Jana" who died in 392 AH.

The Book of Characteristics In this book, the author discusses the structure of the language, its jurisprudence, and its origins and presents issues from the origins of the language: such as analogy, approval, ills, truth and metaphor, introduction and delay, origins and branches.