Writing a novel is as solitary a process as filmmaking is collaborative. When you read a book, you use your imagination to visualise the characters and locations. In a film it is laid out for you. Books tell, films show, and what they show may not be what the reader had in mind at all. Acclaimed screenwriter of films such as Such a Long Journey and the soon to be released Namesake, Sooni Taraporewalla writes here about the perils and many satisfactions of adapting a book into film.