Further reading and sources: Islamic:
Homosexualities by Stephen O. Murray and Will Roscoe
Before Homosexuality in the Arab-Islamic World by Khaled El-Rouayheb
Homoeroticism in Classical Arabic Literature by J. W. Wright and Everett K. Rowson
Homosexuality in the Middle East and North Africa by Vincenzo Patanè
The word 'Al Muqaddimah', or 'the introduction' (المقدمة), comes from the Arabic verb 'to inroduce' (يقدم) [he introduces].
The book referred to is usually 'Muqaddimah of Ibn Khaldun' (مقدّمة ابن خلدون), details of which can be found on Wikipedia.