I enjoyed the promotion of PacketPub myself, and got 2 books:
Many thanks to Siddharth from PacketPub.
Anyway, i’m reading the first book, Game Development with Three.js, and so far it’s very a very pleasant reading. It’s not a very long book, and i’m already at Chapter 3. I think it aims to give you a good overview of the Library, without going into the depths of WebGL, but showing everything you need to know to create interactive 3D games or animations.
Here’s what i’ve done so far: http://jsfiddle.net/thiagoponte/2LQmZ/