at-Tasʿīnīyah (The Ninety-Part Treatise) Composed by Shaykh al-Islam Ahmad ibn ʿAbd al-Halim ibn Taymiyyah (661–728 AH) Studied and critically edited by Dr. Muhammad ibn Ibrahim al-ʿAjlan Faculty Member, Department of Creed and Contemporary Sects, Imam Muhammad ibn Saud Islamic University [Volume One]