The recruits in Islamic State training camps were made to study textbooks about Wahhābī creed.36 In the summer of 1436/2015, the Islamic State’s official publishing house began the printing of classic Wahhābī texts, from Ibn ʿAbd al-Wahhāb’s Arbaʿ qawāʿid fī ʾl-dīn and Kashf al-shubuhāt to Sulaymān ibn ʿAbdallāh’s al-Dalāʾil fī ḥukm muwālāt ahl al-ishrāk and Ḥamad ibn ʿAtīq’s Sabīl al-najāt waʾl-fikāk. The purpose of printing these texts was to inculcate in the new generation of jihādīs a proper understanding of Islamic belief, one that was exclusivist and militant.