Simplify the following text for a Grade 9 native English-speaking person.
Original: The fair is also notable as Cairo-based publishers produce an estimated three of five Arabic language books printed in the world , and the state owned General Egyptian Book Organisation â '' who coordinate the fair â '' is the largest book publisher in the Arab world .
Simplified: Cairo publishers make 60 % of Arabic language books printed in the world . The state owned General Egyptian Book Organisation , is the largest book publisher in the Arab world .