Letter worked as a good promotional device for 'Pink': Big B

Shoojit (co-producer Shoojit Sircar) said then why don't we take the essence of the film and put it in the form of a letter and why don't you write it to your granddaughters... It will be a nice gesture and it will be something that we will be able to convey to the audience without revealing the story. So what you saw in the letter, was the essence of 'Pink'.