Human Nature
You can find his ideas on human nature in his book Maqamaat. https://www.javedahmadghamidi.com/books/5aa66ae35e891e8f44a43f5f?chapterNo=21&lang=ur
Book on Islam and Fitrah is yet not published. You are advised to seek permission from your institution to cite videos of Ghamidi saheb. A fellow scholar has done it before.