The holy book Quran is the book of doctrine of the Islam religion together with the sayings of prophet Muhammad and his practices.
Are you referring to religion or or the doctrine of law? Doctrine in both cases means "by the book" or " the teaching or interpretation of the book".
The religion is called Islam; the followers are called Muslims.
Islam.
Islam
Islam
The Qur'an is the holy book of Islam, which is the religion followed by Muslims. It is believed to be the literal word of God as revealed to the Prophet Muhammad.
Qur'an
The Qur'an is a holy book used by the Islam religion.
Qur'an is the only official book of Islam. This holy book is used for guidance and practice. The entire Qur'an is considered by every Muslim as being "nazil" or sent down from heaven.
Islamic is an adjective that means related to Islam religion or related to Muslims as followers of Islam religion. For example Islamic holy book means the holy book for muslims.
Islam is not focused on any religion. The Holy Qoran was revealed to Prophet Mohammad as a Scripture from Allah (God) for the people of this world. The followers of this Book and the teachings of the Prophet Mohammad are called Muslims, and the religion is known as Islam.
The religion is called Islam; the followers are called muslims; their holy book is the Quran.