Qur'an
The Qur'an is the Last and Complete Book Allah Soubhana wa T'ala sent on earth for our guidance in life. Qur'an came after the torah and the bible because these two first books were for the acknowledgement of Allah. In other words, to recognize Him and to worship only Him. Through following the Qur'an, we can live a perfect life without any problems or whatsoever and we can also avoid confusion in our life. Basically, Allah sent the Qur'an through the prophet Muhammad peace be upon him to show us the true meaning or goals of our life. The reason why we are living. If you think about it, you'll understand everything about your life and like many others you’ll also REconvert to Islam. Be the way, did you know the EVERYDAY at least 10 people Reconvert (what i mean by REconvert is that you are born Muslim but your parents give you some other religion) to Islam.

Forgive me my borthers is there is any mistake in my definition
The Qur'an is the Holy book sent by Allah.