Attainment of Happiness: Hadith Encyclopedia on Tauhid
is the most valuable book on the topic of Islamic Monotheism. It contains all the authentic hadith related to tawheed—the worship of One God—all in one place, organized by chapters according to their subject matter. The very accomplished author of this book is a very well-known Islamic scholar and jurist of the present day.
The author, Sheikh Salaah bin Muhammad Al-Budair, is the Imam and Khateeb of the Prophet's Mosque in Madinah and a Justice on the Appellate Court in Madinah. He has chosen the hadiths in this book with due care and diligence. In order to compile these hadiths, he has meticulously studied almost the entire stock of hadith literature available. Like an expert gems dealer, Shaykh Salaah has chosen the hadiths which are the most relevant in terms of their meanings and context for the purpose of explaining a particular topic. For this purpose, on some occasions, a single hadith has been taken from many different books of hadith.