The Book of Forty Hadith Regarding the Madhab of the Salaf by Shaykh Ali Al-Hadadi is a notable compilation of hadith focused on principles and beliefs rooted in the methodology of the Salaf (righteous predecessors). Shaykh Ali Al-Hadadi has carefully selected 40 authentic narrations that emphasize the correct Islamic creed, methodology, and approach to understanding and implementing the teachings of Islam.