quran is the book of islam. god(allah)saied in quran 15:9 {{{{verily we:it is we who have sent down the dhikr(means quran) and surely, we will quard it (from corruption)}}}} in another chapter of quran allah saied(2:23 and 24) {{{{and if you (arab pagans,jews and christians) are in doupt concerning that which we have sent down(i.e. quran) to our slave(muhammad peace be upon him), then produce a surah (chapter) of the like thereof and call your witnesses(supporters and helpers) besides allah, if you are truthful(2:23)but if you do not it, and you can never do it,then fear the fire(hell) whose fuel men and stones, prepared for the disbelievers(2:24}}}}} also allah saied in quran to introduce quran to humans(18:54) {{{And indeed we have put forth every kind of example in this quran, for mankind.but, man is ever more quarrelsome than any thing}}} see these site to know some intersting thing about quran http://www.miraclesofthequran.com http://www.evidencesofcreation.com http://www.science4islam.com