The Key To Understanding Islam Hardcover Edition. This book explains that Islam is a code of living that covers all aspects of life. It comprises a set of acts of worship: some verbal, some practical and others that are constituents of belief. All of them play important roles in placing morality on a solid foundation and in strengthening the good qualities in people so that they are keen to follow the right path, ensuring social unity and strengthening bonds within the community. The book cites many examples and speaks about the importance Islam attaches to knowledge. It mentions a number of recent scientific discoveries that the Qur'an referred to fourteen centuries ago.