How does Sharia law treat Non Muslims? The answer to this also answers the question what Islam says about Non Muslims. This is also the reason why all non Muslims should know about Islam and its nuances if they care about future.
One of the four schools of Sunni Islam is Shafi'i school. 'Umdat as-Salik wa 'Uddat an-Nasik is the manual of their law book which was translated in to English by an American Muslim Nuh Ha Mim Keller under the title ‘Reliance of the Traveller and Tools of the Worshipper’. In short it is called ‘Reliance of the Traveller’. This translation was approved by Al-Azhar University, the most authoritative institute in the Sunni branch of Islam.