Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Sunni Muslims hold Ali in high respect as one of the Ahl al-Bayt, a foremost authority on the Qur''an and Islamic law, and as the last of the four Sunni Rightly Guided Caliphs.Sunnis maintain that Ali was the first male to convert to Islam, when he was 10 years old.Sunnis view Ali as one of the greatest warrior champions of Islam. Examples include taking on the Quraish champion at the Battle of the Trench when nobody else dared.