Best book for indian history for competitive exams

What I believe is, that knowing about Indian history opens your new horizons by getting valuable insights about various complexities we faced in our past. Additionally, knowing the impactful contribution of our freedom fighters, leaders and thinkers changes your thinking capability. Along with this, relating all the past issues with contemporary problems helps you to resonate positive perspective.  Today, I will let you some best books for Indian history that you can purchase from www.bookswagon.com without any hindrances. 
(a)    Ancient India by R.S. Sharma
(b)    Freedom at Midnight by Dominique Lapierre
(c)    India after Gandhi by Ramachandra Guha