The Book of Lamam is a book in grammar, classified by Abu al -Qasim Abdul Rahman bin Ishaq Al -Zajaji, in which it has demonstrated the types and locations of the Arabs in the words of the Arabs and the Holy Qur'an, as he worked to clarify their meanings and explain their behavior, and he mentioned evidence on that, as he touched on the differences of scholars in some of them, and he classified them He mentioned thirty -one species and singled out for each type. Al -Zajaji said in his introduction: "This is a brief book in mentioning the lamas and its locations in the words of the Arabs and the book of God Almighty and their meanings and their behavior and protest for each of its locations and among the scholars in some of them from the dispute and God is success."