What/who are ahlul kitab? Are Muslims a subset of ahlul kitab?
Correct me if I'm wrong, but: Ahlul kitab means "people of the book" in English. What is the "book" in this phrase, and what "people" are being referred to?
Ahlu Al-Kitab literally means "people of the book." It refers to the Islamic belief that Allah (God) revealed (primarily) two major books prior to Islam: The Injeel (Gospel/Bible), and the Tawrah (Torah).
Hence, Ahlul-kitab is "the people of the (previous scriptures)," i.e. the Jews and Christians. It does not specifically refer to any particular sect within these two groups (eg. catholic vs. orthodox Christianity), but generally to both groups.
Alhlul-Kitab means That have a Holly book (There religon Book that came from there Prophet). In other word Hazrat Esa(A.S) and his Ummah, Hazrat Mousa (A.S) and his Ummah, Hazrat Daud (A.S) and his Ummah And Hazrat Muhammad (S.A.W) and his Ummah these are called Alhul-Kitab. Becase these Prophet have Torat, Zaboor, Injeel and Quran E Pak. These four Ummah Is Called Alhlul-Kitab.
According to Quran (surah Alhaj), it refers to the followers of five religions: Islam, Jews, Christianity, Zoroastrianism and Sabians. The origin of the word is from the Hebrew "הספר" meaning people of the book which Jews used to use to refer to themselves.