Solution:Hermann Kulke is a German historian and an Indologist, who was a professor of South and Southeast Asian history at the Department of History; Kiel University (1988-2003). He edited the book - The State in India 1000-1700.Brajadulal Chattopadhyaya taught Early Indian History for more than three decades at the Centre for Historical Studies, JNU, and New Delhi. The Making of Early Medieval India is a collection of essays that together seek to explore the processes and nature of change in Indian society over about six hundred years.
Peter Jackson-authored the book - The Delhi Sultanate: A Political and Military History. He meticulously analyzes the few surviving literary histories produced by officials of the Delhi Sultanate (1210-1526). Professor Sunil Kumar - in The Emergence of Delhi
Sultanate: AD 1192-1296, charts the history of the structures that sustained and challenged this regime, and of the underlying ideologies.