The Quran is the miracle from Allah, it is a guidance for people. And Quran is not a book like any other book, you dont read Quran just to get hasanaat (reward), it is a book that you ponder upon and get guidance from it.
Many people read Quran but do not benefit from it, becuase they are not seeking any benefit from it. Quran talks to us all on different levels, and if youre not willing to listen and your hearts are closed then youll not benefit from it.
A part of the Quran was revealed in Makkah for the unbelievers, and a part in medina where there were mixed religions, and later in medina when muslims became majority. So Quran has different styles for people in makkah and medina.