The Book of Monotheism (Kitab at-Tawheed) by Sheikh Muhammad ibn Abdul-Wahhab:

The Book of Monotheism (Kitab at-Tawheed) by Sheikh Muhammad ibn Abdul-Wahhab is a foundational work that clarifies the true meaning of Tawheed—worshiping Allah alone. Through Qur’anic verses, authentic Hadith, and insightful explanations, the book highlights the importance of pure faith while warning against forms of shirk and misguidance. This English edition presents the text in a clear and accessible manner, making it an essential resource for anyone seeking a deeper, authentic understanding of Islamic creed.