The Book of the Rules of Grammar by Sibawayh is one of the most important linguistic works in Arabic. It is the first systematic book that arranges and documents the rules of the Arabic language. The book was written in the second century of the Hijri calendar, which corresponds to the eighth century AD. The book is named after its author because he did not title it himself. The people of his time and before him used to give a name to every book, and it is said that Sibawayh could not name it because he died young. The book was known as the Quran of Grammar due to its fame and excellence.

Sibawayh's book has been a reference for Arabic grammar for centuries. It is considered a masterpiece that has stood the test of time. The author's unique approach to grammar has made it an essential tool for anyone who wants to learn Arabic. The book is available for free on the Android platform, and it is published by marqoom.org. It is an excellent resource for students and teachers of Arabic and is highly recommended for anyone interested in the Arabic language.