The Ahlus Sunnah agreen on the main proponents to Aqidah however there are some subtle differences. The three main schools are 1) Ashari, 2) Maturudi, 3) Athari.

Ash’ari

Beginner

• Qawa’id al-Aqa’id by al-Ghazali
• al-Kharidah al-Bahiyah by Ahmad al-Dardir
• Jawharat al-Tawhid by al-Laqqani
• Umm al-Barahin by al-Sanusi

Intermediate

• Tuhfat al-Murid ‘ala Jawharat al-Tawhid by al-Bajuri
• Tawali’ al-Anwar by al-Baydawi
• al-I’tiqad by al-Bayhaqi

Advanced

• al-Irshad by al-Juwayni
• al-Ibana by al-Ash’ari
• al-Mujarrad by Ibn Furak
• al-Tamhid by al-Baqillani

Maturidi

Beginner

• Bad’ al-Amali by al-Ushi
• ‘Umdat al-Aqidah by al-Nasafi

Intermediate

• Sharh ‘Aqidat al-Nasafi by al-Taftazani
• al-Musayara by Ibn al-Human

Advanced

• Tabsirat al-Adillah by al-Makhluli
• Kitab al-Tawhid by al-Maturidi

Athari

Beginner

• Lam’at al-I’tiqad by Ibn Qudamah
• Muqadimat al-Risalah by Ibn Abi Zayd
• Bayan I’tiqad Ahl al-Sunnah by al-Tahawi

Intermediate

• Sharh ‘Aqidah al-Tahawiyah by Ibn Abi al-‘Izz
• ‘Aqidat al-Salaf wa Ashab al-Hadith by al-Sabuni
• al-Shari’ah by al-Ajuri

Advanced

• Sharh Usul al-I’tiqad Ahl al-Sunnah by al-Lalika’i

Other creedal schools include Mujassimah (Literalists), Mu’tazilah, Qadariyyah (Dualists) and Jabariyyah (Fatalists).