Good books for learning to use Unity? (not coding)

Unity has so many features it would be nice to read some stuff that goes into those features.
It would also be cool if those books were up to date.

This lists and documents virtually all parts of Unity, and in most regions of the editor you can hit the book icon to shoot to the page regarding that component, etc.

Next, everything is kept up to date very well IMHO :wink:

Best of all its free!