Aqeedah

Khalq Af’aal al-Ibad (The Creation of the Actions of the Servants) by Imam Muḥammad ibn Ismaʿil al-Bukhari

Naqd al-Darimi ala al-Marisi al-Jahmi (The Refutation of al-Marisi) by Imam ʿUthman ibn Saʿid al-Darimi

Al-Kafiyah al-Shafiyah (Nunniyah) by Imam Ibn al-Qayyim

Majmu' al-Fatawa by Shaykh al-Islam Ibn Taymiyyah (Urdu)

Sharh Iqtida al-Sirat al-Mustaqim by Shaykh al-Islam Ibn Taymiyyah

Kitab as-Sunnah by Imam Abdullah bin Ahmad bin Hanbal (Arabic)

Kitab as-Sunnah by Imam Harb Ibn Ismail al-Kirmani (English)

Kitab as-Sunnah by Imam Abdullah bin Ahmad bin Hanbal (English with Arabic Hardcover)

Al-Radd ala al-Zanadiqah wal-Jahmiyyah by Imam Ahmad bin Hanbal