Zeinab Donati, Zeinab Donati has been studying books about various Islamic subjects for more than 19 years. She is deeply interested in history and politics as well as social issues in particular those pertaining... Answered 1 year ago

It depends on the level of knowledge that a person would like to reach. Here below a list of texts I'd recommend.

What A Muslim Should Know and Believe, Sayyid Sa'eed Akhtar Rizvi​​​​​https://www.al-islam.org/what-muslim-should-know-and-believe-sayyid-saeed-akhtar-rizvi

What Everyone Should Know about Islam, Ayatullah Ibrahim Amini   https://www.al-islam.org/what-everyone-should-know-about-islam-ibrahim-amini

Discovering Shi'i Islam, Mohammad Ali Shomali                              https://www.al-islam.org/discovering-shii-islam-mohammad-ali-shomali

Our Belief, Ayatullah Naser Makarem Shirazi                                    https://www.al-islam.org/our-belief-naser-makarem-shirazi

The Faith of the Imamiyyah Shi'ah, Muhammad Ridha al-Muzaffar   https://www.al-islam.org/faith-imamiyyah-shiah-muhammad-ridha-al-muzaffar    

Hope these will help inshaAllah.