Mumbai - Amitabh Bachchan launched the book Once Upon a Time in India - A Century of Indian Cinema penned by Bhawana Somayya on Tuesday night. Big B went into a nostalgic mood at the launch. He shared some beautiful moments of his early days in the Indian film industry. The camera rolls which were used earlier used to be very expensive, veteran Director Hrishikesh Mukherjee used to charge us if we take a retake, told Amitabh Bachchan. I have seen many films in the capitol theatre in Allahabad. The book, which features Big B on the cover contains the century-long history of industry in a fun capsule and includes fascinating facts and milestones.