Spend your time reading the following reviews for this book (upon which I happened to stumble) -
Amazon
My favorite: "If you don't know the background of the Sunni-Shi'a split, it seems to be a strange custom.
The reasons cannot be told in sound bites. Their sadness results from the disrespectful treatment of the Prophet's family for two generations. The complex series of events culminates in extreme cruetly at Karbala."
