Excellent book for giving a brief introduction into Shi'a Islam by an eminent Islamic scholar and its workings, would recommend to anyone who has a slight foundation of knowledge and is looking to expand it further
Muhammad Husayn Tabataba'i or Sayyid Mohammad Hossein Tabataba'i (16 March 1903 – 15 November 1981) was an Iranian scholar, theorist, philosopher and one of the most prominent thinkers of modern Shia Islam.[1] He is perhaps best known for his Tafsir al-Mizan, a twenty-seven-volume work of tafsir (Quranic exegesis), which he produced between 1954 and 1972.[8] He is commonly known as Allameh Tabataba'i and the Allameh Tabataba'i University in Tehran is named after him.