Islam is the fastest growing religion in the world. Amounting to almost quarter of the world's population, as of 2015 there are 1.8 billion adherents of Islam. You can use our reading lists to find the best Islamic books ever written on a variety of subjects. Our book recommendations explore the many aspects of the Muslim faith. This includes religious doctrines, but also the way that the Islamic world contributed to vital developments in Science and Philosophy in the ancient world.