Inspiration is the fuel Bollywood runs on. Sometimes, we're inspired by Hollywood movies, sometimes the Tollywood movies. Inspiration, like creativity has no boundaries. Readers will agree that books are endlessly inspiring. Bollywood filmmakers have found novelty in literary masterpieces too.
Sahib, Biwi Aur Ghulam, the 1962 version produced by the talented Guru Dutt is based on Saheb, Bibi Aur Golam written by the Bengali author, Bimal Mitra.
You can love him, you can hate him but you can't ignore him. Chetan Bhagat's grey cells have given us not one, not two, not three, but four Bollywood movies: Hello, 3 Idiots, Kai Po Che and 2 States, two of these being mega-blockbusters.