I can't say I know too much about Michel Chion himself, but what I do know is that his book 'Audio-Vision' (translated from French) is without a doubt a Bible for my studies. It neither lectures nor speaks down to the reader, but in plain English describes different theories that have otherwise been a mystery to viewers and scholars alike. The book is split into two Parts - one taking a direct approach to audio-visual theory, whilst the second (described as going 'beyond') gets to the more nitty-gritty argumentative stage. I'd call this a Bible because it can literally be picked up, and with each 'Part' having sub-headings for the various theories/semiotics, it is incredibly easy to read.
The book is also broad in its target audience, for it does not root itself to any particular form of media. As a Music student at University, Chion's work has encouraged me to continue my research into film soundtracks and I couldn't think of a better recommendation if you're new to this area.