Both Ziauddin Barani and Shams-i-Siraj Afif wrote historical chronicles titled "Tarikh-i-Firoz Shahi". However, Ziauddin Barani's work is a general history of the Delhi Sultanate up to the early years of Firuz Shah Tughlaq's reign (around 1357-1360), whereas Shams-i-Siraj Afif's "Tarikh-i-Firoz Shahi" is specifically and entirely dedicated to the reign of Firuz Shah Tughlaq (1351-1388). Given that the title refers to Firoz Shah, Afif's work is the comprehensive history of his reign under that title and is often the primary text referred to for details of his rule.