Hello,
While my main impetus of study is Islamic civilization in Spain, I'm very curious about expanding my knowledge of the much less talked about Islamic civilization in Italy (to have a more well rounded idea of Muslim impact on Europe as a whole). Are there some good sources I could use to begin?
I'd start with Alex Metcalf's The Muslims of Medieval Italy, (Edinburgh, 2009) as a general introduction (some chapters are available from his academia.edu page, along with a number of articles), then look at Jeremy John's Arabic Administration in Norman Sicily: The Royal Dīwān, (Cambridge, 2002). Since you'll need to contextualise this within Sicilian history I'd also look at this introductory bibliography on the Normans in Siciliy.