Ash-Shari'ah by imam al-Ajuree (360H)

Also known al-Ibana al-Kubra, this is a collection of ahaadeeth and Athaar on the saved group and its characteristics and those opponents, by Imaam Ibn Battah (387H).

It is a book relating the words of Imam Al-Kirmaani, a companion of Imam Ahmad, which sets out points of belief on which the Salaf are unanimous.Very nice edition verified and annotated, prefaced by Muhammad al-Madkhali.

Famous collection of hadith and athar on aqeedah and manhaj saheeh by Imaam Ibn Abi 'Asim (287H).

The Kitab at-Tawhid by Imam ibn Khuzayma (223-311H).

Kitab at-Tawhid written by a great among the Imams of the Salaf, Imam Ibn Mandah in a beautiful edition with a full Tahqiq.

Matn with harakat (vowels) of risala Usool as-Sunnah of Imaam Ahmad. Treaty in which the Imam exposes the Manhaj and Aqeedah of Ahl us Sunnah. Accents on all letters (tashkil - harakat).

Treaty on the Aqeedah and Minhaj of a 4th century imam known as Ibn Abi Zamaneen. Very rich and interesting, you can see that the Aqeedah of the Salaf and the manhaj is the same everywhere (the imam is from Cordoba)...

This great scholar of the Hadith brought together athars demonstrating the benefits, importance, value people and the science of hadith. With all the accents (harakat) and authentication.