https://hindupost.in/history/heroic-hindu-resistance-to-muslim-invaders-636-ad-to-1206-ad-by-sita-ram-goel-chapter-1-national-perspective-on-indian-history/
"Heroic Hindu Resistance to Muslim Invaders (636 AD to 1206 AD)" by Sita Ram Goel – Chapter 1: National Perspective On Indian History