Taqwiyat-ul-Imaan is a great work of a great person, Shah Ismail Shaheed. He dedicated this book on the most important subject of Tawhid, oneness of Allah [Islamic phrases="Subhanahu wa Ta'ala"]E[/Islamic] It is a comprehensive work on Tawhid and explain all the types of shirk and also they implication of Tawhid in one’s life. It is one of the most comprehensive work on Tawhid.