Let me start by apologising. I know it's deeply untrendy to read Harry Potter if you're an adult, so I imagine that reading books about reading Harry Potter must be an enormous intellectual sin. I have no excuses. I know the books aren't brilliantly written but I enjoy them in the way that some people enjoy watching 24 or Lost or whatever. They're silly but entertaining romps and the mystery at the heart of the series is genuinely intriguing.
David Langford's book delves into the unresolved questions that Harry Potter and the Deathly Hallows should finally deal with, explores the jokes and perhaps hints hidden in the names of key characters and examines Rowling's development as a writer.
Langford is fairly perceptive and knows his subject but the book is ultimately very slight, not to mention riddled with typos. It can be read in a couple of hours but it's debatable whether it contains anything that you couldn't find by spending the same amount of time on any of the countless fan websites.
Still, it filled a rainy afternoon and served to whet my appetite for next month's big finish.