This is the first volume in the 'Al-Kamel fi Al-Riyadiyat' (The Complete Guide to Mathematics) series by author Hossam Mohammed Abdi. Published in 2016, this book offers a foundational exploration of core calculus concepts. It meticulously covers essential topics such as limits, the principles of continuity, and the rules of differentiation. Designed for students aiming for a clear and comprehensive understanding, this text serves as an invaluable resource for mastering the fundamental building blocks of higher mathematics and preparing for more advanced studies. It's an essential academic guide from Dar Safa for Publishing and Distribution.