This document provides an introduction and overview of the book "Kitaab at-Tawheed" by Shaykh Muhammad ibn 'Abdul-Wahhaab. It discusses the importance and significance of the book, its organization and comparison to Sahih al-Bukhari. It also outlines the types of hadith evidence used in the book and lists several other books titled "Kitaab at-Tawheed" written by other scholars. The introduction aims to establish the scholarly authority and beneficial content of Shaykh Muhammad ibn 'Abdul-Wahhaab's book on the topic of tawheed, or Islamic monotheism.