The Comoros (officially: Union of the Comoros) is an Arab state located in the Indian Ocean near East Africa. Scholar Mahmoud Shaker documented its history and geography in his book "The Comoros Islands." He detailed the four main islands: Grande Comore, Anjouan, Mohéli, and Mayotte. He explored the blend of Arab, African, and Malay cultures and the spread of Islam in the archipela.