Sources for Information about the Delhi Sultans:

1. Primary Sources:
Primary sources are the original materials or records that provide direct evidence of the events and activities during the time of the Delhi Sultans. These sources are considered the most reliable and authentic for studying the history of the Delhi Sultanate. Some of the primary sources include:

- *Tarikh-i-Firoz Shahi*: This is a historical chronicle written by Ziauddin Barani, a 14th-century courtier and historian. It provides valuable insights into the rule of the Tughlaq dynasty, particularly during the reign of Sultan Firoz Shah Tughlaq.

- *Tawarikh-i-Mubarak Shahi*: This work was authored by Yahya bin Ahmad Sirhindi, an official historian during the reign of Sultan Muhammad bin Tughlaq. It offers valuable information about the rule and administration of the Tughlaq dynasty.

- *Tarikh-i-Mubarak Shahi*: This chronicle was composed by Yahya bin Ahmad Sirhindi. It provides crucial details about the reign of Sultan Muhammad bin Tughlaq.

2. Secondary Sources:
Secondary sources are works that interpret and analyze primary sources. These include books, articles, and research papers authored by historians and scholars. They provide a broader perspective on the Delhi Sultans by analyzing multiple primary sources and incorporating various historical theories and perspectives. Some notable secondary sources include:

- *The Delhi Sultanate: A Political and Military History* by Peter Jackson: This book is a comprehensive study of the Delhi Sultanate, covering various aspects such as politics, administration, military, and society. It utilizes primary sources and archaeological evidence to present a detailed account of the Delhi Sultans.

- *The Early Delhi Sultanate: A Political and Military History* by Muzaffar Alam: This book focuses on the early period of the Delhi Sultanate, analyzing the political and military dynamics under different sultans. It provides a critical analysis of primary sources and offers fresh insights into the history of the Delhi Sultans.

- *Delhi Sultanate: A Cultural and Political History* by P. M. Holt: This work explores the cultural and political aspects of the Delhi Sultanate. It delves into themes such as architecture, literature, religion, and the interaction between different religious and cultural groups during the Delhi Sultanate period.

In conclusion, primary sources such as *Tarikh-i-Firoz Shahi* and *Tawarikh-i-Mubarak Shahi* offer direct accounts of the events during the Delhi Sultanate. Secondary sources like *The Delhi Sultanate: A Political and Military History*, *The Early Delhi Sultanate: A Political and Military History*, and *Delhi Sultanate: A Cultural and Political History* provide a broader analysis and interpretation of the primary sources, offering a comprehensive understanding of the Delhi Sultans and their era.