Hadith is an important aspect in understanding Sharia and a complicated one. It is the second source of Islamic Sharia. It is an interpretation of the Book of Allah by the Messenger of Allah. It is a very difficult science as it is based upon narration, who narrated it, and how it was narrated. In this book, we tried to make it as simple as we can but it is a service that is studied by the students of Quran and Sunnah at the Master or Ph.D. level.