I will be reviewing Python 3 Object Oriented Programming by Dusty Phillips in a few weeks. At least if the sample chapter, Python object-oriented Shortcuts, is to be believed the book should not provide much of a challenge.
I expect that the book has most to offer to people new to object oriented concepts. I'm particularly interested to see how it manages to bridge the gap between Python 2 and 3. I haven't gotten into Python 3 yet so it's going to be a nice chance to make the leap.