Stop Staring“, by Jason Osipa, is a book about modelling, rigging and animating the face.  It’s especially geared towards rigging, and offers several techniques to reduce (or automate) the number of morph shapes needed for facial animation.

I’ve been working through the book myself; though I don’t yet have a final rig, I have seen rigs completed by other people based off this book, and they seem really cool.

The book also introduces a more practical approach to lip-syncing, based on “visemes,” which is where speech is broken down to it’s visible mouth-movement components, rather then it’s phonetic structure.

You can read more about it in this more in-depth review.