ISLAM It refers to believing in all the four books;

It refers to believing in all the four books; the Torah (Moses), the Psalms (David), the Gospel (Jesus) and the Quran (Mohammad). Muslims also believe that all other books are alteration with time by its followers. Muslims believe that Quran is the only book which can never be distorted as God has himself taken the responsibility of its protection, "We have, without doubt, sent down the Message; and We will assuredly guard it (from corruption)." (15:9) www.mnsu.edu