Abul Hassan Ali nadwi rahimahullah has written a good book on Shaykh ul Islam rahimahullah. You can read the portion dedicated to Shaykh ul Islam Ibn Taymiyyah rahimahullah in Shaykh Abul Hassan Ali Nadwi ra's monumental work "tareekh e dawat wa Azeemat" or you can read the portion directly here http://www.islamicbookstore.com/b8778.html