Yes, Quran was revealed by Allah and it is perfect book. It's not a story book or a sequel. It has a message for how to live on this earth. It's situation based and has solutions for all the problems. The Quran challenged 1400 years ago that if any one thinks that it is not from Allah, then let him/her come up with 10 verses similar to itself. This chanllenge was thrown when Arabian peninsula was at the peak of poetry and literacy. And that challenge is still valid. There have been many who tried and gave up by themselves in coming up with similar verses.
It was revealed in Arabic and only 18% of Muslims are from Arabic speaking. It's very simple and concise in conveying the message, which is no different from other prophets such as Adam, Noah, Abraham, Ishamel, Isaac, Moses, Jesus etc.
