Download the book of "Then I Was Guided" by Tijani Samawi
The author of this book, Tijani Samawi is a learned cleric trained in the Maliki Fiqh. In the middle of his life he travelled to Iraq and met with the late Ayatullah al-Khui. He was greatly influenced by the Ayatullah and converted from Maiki Sunni practice to Shi'a Ithna Ashari practice. This is the story of his conversion. He cites great logic and references.
An autobiographical account of Sayed Tijani's search for knowledge, which aims to remove some of the barriers that exist between the schools of thought of the ahl-as-Sunnah and the shi'a by clearing misconceptions about Shi'ism.