Question: Rajeev Ranjan Nag wrote a book about an Indian politician who was the first and to date only what?
Context: Leela Roy née Nag (Bengali: লীলা রায় ) (2 October 1900 – 11 June 1970), was a radical leftist Indian politician and reformer, and a close associate of Netaji Subhash Chandra Bose Nalini Ranjan Ghosh (Bengali: নলিনী রঞ্জন ঘোষ was an Indian politician.  In the 1958 by-election, he was elected to the Lok Sabha from the Cooch Behar constituency.  In 1962, he was elected to the Lok Sabha from the Jalpaiguri constituency.  Ghosh was a member of the Indian National Congress party. Samir Ranjan Barman is an Indian Politician of All India Trinamool Congress.  He was the Chief Minister of Tripura in India from 19.2.92 to 10.3.93 as a member of the Indian National Congress .  He is the father of the current legislator from Agartala Constituency and All India Trinamool Congress leader Sudip Roy Barman.  He has contested from Bishalgarh constituency in the Assembly elections from 1972 to 2013 in 9 elections consecutively, winning in 1972, 1988, 1993, 1998 and 2003 elections.  He was the leader of opposition in the Tripura Legislative Assembly from 1993 to 1998.  He is also former president of Tripura Pradesh Congress Committee. P. Rajeev(Malayalam: പി രാജീവ്‌ ) is an Indian politician.  He was a member of parliament (Rajya Sabha) from 2005 to 2015.  Rajeev had been the most active member of the upper house during his stint and had raised several popular issues in the house.  When he retired, leaders from most political parties pleaded with CPI(M) general secretary Sitaram Yechury to consider getting Rajeev elected again to the parliament. Nihar Ranjan Laskar (1 May 1932) was an Indian politician.  He was elected to the Lok Sabha the lower house of Indian Parliament from Karimganj, Assam in 1962,1967,1971,1977 and 1980. He was member of the Indian National Congress. Biswa Ranjan Nag (1 October 1932 – 6 April 2004) was an Indian physicist and the Sisir Kumar Mitra chair professor at University of Calcutta.  Known for his research in semiconductor physics, Nag was an elected fellow of Indian National Science Academy and Indian Academy of Sciences.  The Council of Scientific and Industrial Research, the apex agency of the Government of India for scientific research, awarded him the Shanti Swarup Bhatnagar Prize for Science and Technology, one of the highest Indian science awards for his contributions to Physical Sciences in 1974. Rajni Ranjan Sahu is an Indian politician.  He was Member of Indian Parliament from the party Indian National Congress. Rajeev Ranjan Nag is a senior Indian journalist.  In October 2014, Nag was appointed as a Member of the 12th term of the Press Council of India for a three-year term.  Earlier, Nag had also been a member of the 11th term of the Press Council.  Nag is the author of a book on news reporting called He has also written a book in Hindi about former Indian Prime Minister Indira Gandhi called Rajeev Chandrasekhar (born 31 May 1964) is an Indian politician and an entrepreneur who is currently serving as Member of Parliament in the upper house (Rajya Sabha) of the Indian Parliament and also the vice-chairman of the Bharatiya Janata Party-led coalition National Democratic Alliance in its Kerala wing.  He represents the state of Karnataka. Indira Priyadarshini Gandhi (; Nehru; 19 November 1917 – 31 October 1984) was an Indian politician and central figure of the Indian National Congress party.  She was the first and to date the only female Prime Minister of India.  Indira Gandhi belonged to the Nehru-Gandhi political family and was the daughter of India's first Prime Minister, Jawaharlal Nehru.  Despite her surname "Gandhi", she is not related to the family of Mahatma Gandhi.  She served as Prime Minister from 1966 to 1977 and then again from 1980 until her assassination in 1984, making her the second-longest-serving Prime Minister of India after her father.
Answer: female Prime Minister of India