Natwar Singh, former Congress leader, has told NDTV today that the strong reaction from Sonia Gandhi to his new book, proves that it "has touched a raw nerve."   

He  claims that  "50 Congressmen" called him to congratulate him for "telling the truth" in his new book. 

Singh described Gandhi's  son, Rahul, as "a good person" but  said he does not have the fire needed to serve as a full-time politician.

Congress president Sonia Gandhi had said on Thursday that she would write her own book and that the truth would be revealed.

She was reacting to the retinue of charges levelled against her by Singh in his new book, "One Life is Not Enough: An Autobiography", in which he describes her as  "a prima donna", "venomous" and "obsessively suspicious."

Singh, 83, said he looks forward to reading his former boss' book. Singh was a close confidante of the Gandhi family; when the Congress-led coalition came to power in 2004, he was made Foreign Minister but was forced to quit a year later after allegations of corruption.