New Delhi, Aug 01 (ANI): Talking about his book _One Life is Not Enough: An Autobiography_, Former Senior Bureaucrat Natwar Singh said that he has no bitterness for Congress or anybody else. He said that he started with the book in 2011 and it naturally takes time for a book to get completed. He said that the UPA had no foreign policy during its rule and that the prime minister did not visit any neighbouring countries. He also replied to Sonia Gandhi_s answer wherein she said that she will write a book too, and said that he is waiting for Gandhi_s book to come out. Further, he also said that the Gandhis came to him to stop him from writing certain facts.