Yale's introductory Greek history class with lectures from Donald Kagan is available online and part of it covers the Mycenaean empire and its fall.
+1 for this.
For those that are interested:
https://www.youtube.com/playlist?list=PL023BCE5134243987
Yale's introductory Greek history class with lectures from Donald Kagan is available online and part of it covers the Mycenaean empire and its fall.