Authenticity of the Bible..

    The belief of the original holy Books revealed to the Prophets before Prophet Muhammad (pbuh) is one of the six pillars of Faith in Islam:
    Say (o Muslims): "We believe in Allah and that which has been sent down to us and that which has been sent down to Abraham, Ismael, Isaac, Jacob, and to the Tribes, and that which has been given to Moses and Jesus, and that which had been given to the Prophets from their Lord. We make no distinction between any of them, and to Him we have submitted (in Islam)." (Qur'an 2:136). 
    The Qur'an mentioned the name of some of these Books: Scriptures of Abraham, the Torah, the Zabur (Psalms), and the Injeel (Gospel). The Scriptures of Abraham were completely lost, while some parts of the original Torah, Psalms and Gospel are still preserved in the Bible mixed with what people's own hands wrote, as confirmed in the Qur'an. 
    Then woe to those who write the Book with their own hands and then say, "This is from Allah", to purchase with it a little price! Woe to them for what their hands have written and woe to then that they earn thereby. (Qur'an 2:79).
    The original Torah and Gospel are the literal Word of Allah revealed to his Prophets Moses and Jesus (peace be upon them -pbut), whereas the books of the Bible are merely narratives or stories written in the third person, i.e., the sayings and deeds of the Prophets were written  by historians and not by the Prophets themselves. For example, the book of Deuteronomy is one the fit books attributed to Prophet Moses (pbuh). If this book was really revealed to Prophet Moses (pbuh) or even written by him, how could it mention his death: 
   And Moses the servant of the Lord died there in Moab, as the Lord had said.  He buried him in Moab, the the valley opposite Beth Peor, but to this day no-one knows where his grave is. Moses was a hundred and twenty years old when he died… (Deuteronomy 34:5-7). 
    The Gospel revealed to Prophet Jesus (pbuh) was lost and many Gospels were written. The church chose four gospels (Matthew, Mark, Luke and John) and destroyed or banned the rest. Although these gospels include some fragments of the original Gospel, it is very clear that none of them is the Gospel of Prophet Jesus (pbuh), because: 

•     All the four gospels contain many contradictions and errors while the Gospel of Prophet Jesus (pbuh) which is the Word of Allah was free from contradictions and errors. 
•     These gospels are different accounts or reports of the life of Prophet Jesus (pbuh), written by men. They mention his birth, his alleged crucifixion and death, etc, which cannot be mentioned in the Gospel revealed to Prophet Jesus (pbuh) during his mission.