Bhagwat Geeta: What’s Special in it?

Geeta or we say Bhagwat Geeta need no introduction specially in India. Words of wisdom uttered by Lord Krishna in the battlefield to Arjun and showing him the real path in the search of which every human is racing towards.
So, can you guess what’s special about it, I mean it is just a subpart of Mahabharat which is the longest written poem in the world then why that subpart is like guide to all. How a simple book is interpreted differently by different person Swami Vivekananda found a different way from Mahatma Gandhi, Hitler found different meaning from Oppenheimer. How can a simple set of verses can affect life of different person differently?
First let me explain you the background of Geeta or you can say Bhagwat Geeta. It is the compilation you Mahabharat written by Maharshi Vedvyas. It started when Arjun became sad and want to move out from the battle as he was confused weather is, he doing right to fight with his own kin and Kith then only lord appear and tell arjun about the righteous path through different Yoga namely Karam Yoga, bhakti Yoga and Dhyana yoga. He tells Arjun that he is the starting and end point of everything each and every living or non-living thing is emerged from him and at the end to be submerged into him. He is the creator preserver and destroyer. Lord tell about how one can understand him and how one control his senses.
Don’t you think the main concern of today’s world is how can he control his mind and get the peace within. Don’t you think that all our act is just in the search of peace and at the end of the day we found our self in deep down in unresents. One should read Geeta and understand that how can things be easily sorted out.
Have u read this book what you think about Geeta and if not when you are planning to read?