Zaid Alsalami, Shaykh Dr Zaid Alsalami is an Iraqi born scholar, raised in Australia. He obtained a BA from Al-Mustafa University, Qom, and an MA from the Islamic College in London. He also obtained a PhD from... Answered 1 year ago

Bismihi ta'ala

There are numerous books on the topic of theology/usul al-din, 'aqaed, that would be beneficial for anyone to read. It would just depend on whether you would like a general reading book, or a study textbook. Here are some quick suggestions, very briefly:

For general reading, I would recommend you read the books of: Shahid Mutahhari, Seyid Mujtaba Lari, Shahid Dastghayb, Sh. Makarim Shirazi also has some good general aqaed books. 

For textbooks on Islamic theology, I would suggest:

Aqaed al-Imamiyah, by Sh. Mudhaffar.

Theological Instructions, by Sh. Misbah Yazdi. 

These are all written by authoritative Ulama, so you will certainly benefit from them. You can find all these texts online as well.  

With prayers for your success.