"The series combines academic rigour and accuracy with jargon-free language. The book mades fascinating reading and helps to better understand the differences between Sunni and Imami theology and jurisprudence."

– Islam and Christianity

"This is a very good book.The author is intimately familiar with the subject matter and has a sure grasp of the sources, the issues involved and the state of research."

– Etan Kohlberg - The Hebrew University of Jerusalem