Abu Hamid Muhammad al-Ghazali is one of the thinkers who left a significant impact on the history of Islam. His writings and compositions have attracted the attention of researchers and thinkers in the West.

This study explores an important aspect of al-Ghazali that has not been fully examined, specifically his dialectical debates with the Ismailis during the Fatimid era and the early stages of the Alamut fortress period. Al-Ghazali authored several writings refuting Ismaili principles, most notably in his work 'Kitab al-Mustazhiriyya'.

The author addresses the main topics and arguments presented by al-Ghazali in this book (Al-Ghazali and the Ismailis) and analyzes how al-Ghazali himself was influenced by the Ismailis. Al-Ghazali's debate with the Ismailis formed an important chapter in the history of Islamic thought, to the extent that this book seeks to explore the broader intellectual and political significance of that confrontation, specifically the impact of opposing forces and the essential and urgent issues that marked al-Ghazali's era.