I recently learned about the 827 AD Muslim invasion and was hoping to find a good book about the invasion, occupation and/or the Norman conquest after.
An audiobook would be even better but it seems like a pretty specific subject.
Great choice of topic! In general, scholars have written far more about Norman Sicily than the Muslim period preceding it. This is partially due to the lack of surviving source materials (most of which are written in Arabic) and the general focus on Latin Christendom within Medieval Studies. To my knowledge, the only recent book written in English devoted exclusively to Muslim Sicily is Leonard Chiarelli’s A History of Muslim Sicily (Malta: Midsea Books, 2011). I have only read parts of this book, though, and it has not received many peer reviews from what I can tell, so I am unsure of how solid the research for it is as a whole. Sarah Davis-Secord’s excellent Where Three Worlds Met: Sicily in the Early Medieval Mediterranean (Ithaca: Cornell University Press, 2017) also has a ton of information about Muslim Sicily, though it is a fairly dense book that might be tough to digest for a general reader.
Your options open up, however, once we get into the Norman period. I would recommend for a general reader Hubert Houben’s Roger II of Sicily: A Ruler between East and West (New York: Cambridge University Press, 2002).
From there, scholars have written a number of well-researched (but at times dense) books about the Norman period that might interest you as well. Here are a few listed in order of author last name:
Birk, Joshua. Norman Kings of Sicily and the Rise of the Anti-Islamic Critique: Baptized Sultans. New York: Palgrave Macmillan, 2016.
Granara, William. Narrating Muslim Sicily: War and Peace in the Medieval Mediterranean World. New York: I.B. Tauris, 2019.
Hayes, Dawn Marie. Roger II of Sicily: Family, Faith, and Empire in the Medieval Mediterranean World. Turnhout: Brepols, 2020.
Johns, Jeremy. Arabic Administration in Norman Sicily: The Royal Dīwān. New York: Cambridge University Press, 2002.
Loud, Graham. Roger II and the Creation of the Kingdom of Sicily. New York: Manchester University Press, 2012.
Mallette, Karla. The Kingdom of Sicily, 1100-1250: A Literary History. Philadelphia: University of Pennsylvania Press, 2005.
Metcalfe, Alex. Muslims and Christians in Norman Sicily: Arabic Speakers and the End of Islam. New York: Routledge Curzon, 2003.
Simonsohn, Shlomo. Between Scylla and Charybdis: The Jews in Sicily. Leiden: Brill, 2011.
Happy reading! I am unsure if any of these books are available on audiobook (I doubt it), but hopefully these texts get you off to the right start.