SubhanAllah, Salahudeen rahimullah was a great hero.
I listened to his biography, it was amazing.
Here's a teaser Halal Dawa Recards made :
(the link to the actual lecture is there on the youtube page.)
If you want to download this lecture:
By Sheikh Zahir Mahmood. The Worshipper, The Warrior, The Conqueror, The Legend Salahudeen al-Ayyubi, celebrated by the muslims as the liberator or al-Quds and equally revered by the west for his compassion and bravery. The CD lecture details the heroic life and efforts of this warrior and ascetic, may Allaah have mercy upon him.