She was a professor of archaeology and ancient history at the Centre for Historical Studies at the Jawaharlal Nehru University, Delhi. She retired in 2000, and is currently an independent researcher living in Mumbai. She is noted for work on investigating the factors contributing to the end of the Indus Valley Civilization.
- Encounters, the westerly trade of the Harappa civilization, Oxford University Press (1981).
- Enquiries into the political organization of Harappan society, Ravish Publishers (1991).
- The End of the Great Harappan Tradition, New Delhi: Manohar, ISBN 81-7304-331-0. (2000)
- Understanding Harappa: Civilization in the greater Indus Valley, Tulika Books, ISBN 81-85229-37-6 (2002)
- Mobile and Marginalized Peoples, New Delhi: Manohar (2003)
- Trading Encounters: From the Euphrates to the Indus in the Bronze Age, Oxford University Press (2nd edition), ISBN 0-19-568088-X (2006)
- The Other Indians - Essays on Pastoralists and Prehistoric Tribal People, Three Essays Collective (2004)
- Ayodhya: Archaeology After Excavation, New Delhi: Tulika Books (2007)
- The Timechart History of Ancient Egypt, Worth (2007). ISBN 190302532X.
- Makers and Shapers: Early Indian Technology in the Household, Village, and Urban Workshop, Tulika Books (2007).
- Being Tribal, Primus Books (2010). ISBN 9380607024.
Shereen Ratnagar along with archaeologist D. Mandal spent a day, in 2003, examining the excavations conducted by the Archaeological Society of India (ASI) at the site of the Babri Masjid on behalf of the Sunni Waqf Board. Subsequently, the two researchers wrote a highly critical appraisal of the excavations by the ASI titled Ayodhya: Archaeology after Excavation. In 2010, they appeared as expert witnesses for the Sunni Waqf Board in the Ram Janmabhoomi-Babri Masjid case in the Allahabad High Court.
In its judgement on the Ayodhya dispute, the High Court flayed the role played by several witnesses including Ratnagar, who was forced to admit under oath that she had no field experience in archeological excavations in India. Ratnagar and her supporters defend her record by stating that she has participated in some archaeological digs at sites outside India, such as Tell al-Rimah, Iraq, in 1971, as well as in Turkey and the Gulf.
- "Shereen Ratnagar". Harappa.com. Retrieved 2014-12-25.
- "Shereen Ratnagar: A past to mirror ourselves" (PDF). Topoi.org. Retrieved 2014-12-25.
- "Trench warfare: Writing on the Wall". Times of India. 16 October 2010. Retrieved 2014-12-25.
- How Allahabad HC exposed experts espousing Masjid-cause, Times of India, October 9, 2010, 03.07am IST
- Iraq Vol. 34, No. 2 (Autumn, 1972), pp. 77-86. Published by: British Institute for the Study of Iraq
- Publisher's statement on Shereen Ratnagar, Trading Encounters (Oxford University Press, 2006)
- Babri witnesses get HC contempt notice, Indian Express, Thu May 20, 2010, 04:18 hrs