A fantastic overview of Orwell's life and works - it runs a bit long in a few places but the extra detail also contributes to a sense that you're getting a very deep, and well-written, account of both the man and the subject matter.
The concluding section on Orwell's global view (and specifically Animal Farm and 1984) is particularly good and does enough pulling in of previous discussions in earlier chapters that it could stand alone as a full analysis of the worldview (and its insidious causes) that Orwell wanted to place under his satyrical microscope.