yes, itself claim to be God's word
By reading about Gods Divine Revelation
It depends on the specific text you are referring to. Many religious texts like the Bible, Quran, and Vedas contain accounts of God's revelation and his relationship with his people. These texts are considered sacred by believers of their respective religions.
Qu'ran
died
bible/ scripture
bible/ scripture
Descended from gods
The gods will claim their children whenever they feel that their children are ready to become a demigod hero for the rest of their lives.
The Gods
Islamic religion is a monotheistic religion that worships one and only one God with no partner, no companion, no son, no father, no associate, and no equivalence. The main teacher of Islam religion is prophet Muhammad (peace be upon him) per Quran revelation to him by God.
Epistles
Because it is the first sign that he is a prophet and that he is gods messenger