An Introduction to Islamic Monotheism. Tawheed means “declaring God one”, while shirk means “associating partners with God”. Thus tawheed is monotheism while shirk is polytheism or idolatry. And there are different categories of Shirk and Tawheed, please download below books to understand the clear meaning of Tawheed and Shirk. Belief Aqeedah-Tawheed and Shirk Size …