In 'Fundamentals of Tawheed: Islamic Monotheism', Dr. Bilal Philips provides a simple yet comprehensive explanation of the concept of the Oneness of Allah, the core of the Islamic faith. Without Tawḥeed, our actions and worship would be rendered null and void. This book about Tawheed gives us the information necessary to fully understand Allah's Oneness and recognize the practices that go against it. At the same time, Dr. Bilal Philips also gives a detailed explanation of the opposite of Tawheed, which is Shirk!

Tawheed, the belief in the Oneness of Allah, is the core of the Islamic faith. Humans, as the designated vicegerents of Allah on earth, have been ordered to put this belief into practice in every aspect of life. Without tawheed, our actions and worship would be rendered null and void. This is an awful truth, but one that we must realize so that we can correct the basis of what we think, say, and do, in order to receive the hoped-for rewards and to avoid a terrible punishment. Dr. Philips gives us the information necessary to recognize the practices that go against tawheed so that we may change any mistaken patterns of thought or behaviour and approach Allah in the way that He loves and wants from us.