whats the holy book of islam

The Qu'ran

http://en.wikipedia.org/wiki/Quran

The Holy Qu' ran.

The holy book of Islam is called the Quran. It is believed by Muslims to be a revelation from God to the Prophet Muhammad through the angel Gabriel. The Quran contains the teachings and principles of Islam, as well as guidance for personal conduct, social issues, and matters of faith. To find information on the Quran, you can refer to reliable sources such as books on Islamic studies, websites of reputable Islamic organizations, or consult knowledgeable individuals, such as Imams or scholars who specialize in Islamic studies.