Surinder Singh has been Professor at the Department of History, Punjab University, Chandigarh. His books and articles explore medieval India and undivided Panjab, with reference to polity, society and culture. Ishwar Dayal Gaur is former Professor of History, Department of Evening Studies-Multi Disciplinary Research Centre, Panjab University Chandigarh. His area of research and interest is Panjab history, Literature and culture.