You might be interested to know that, of all the literature out in the public domain, these two pieces of writing on Shia Islam have had the most impact on me personally in so far as the subject of religion is concerned:
Book: published in 1996:
http://www.iis.ac.uk/view_article.asp?ContentID=100518
Short article: written in 1952:
http://easynash.blogspot.com/2006/12/what-have-we-forgotten-in-islam-aga.html
easynash
Islam, eminently logical, placing the greatest emphasis on knowledge, purports to understand God's creation:Aga Khan 4.
The God of the Quran is the One whose Ayats(Signs) are the Universe in which we live, move and have our being:Aga Khan 3
