(I'm about 35-40% in now, but going back to the very beginning -- I listened to this in the car today:)
"Mr Dursley blinked and stared at the cat. It stared back. As Mr Dursley drove around the corner and up the road, he watched the cat in his mirror. It was now reading the sign that said Privet Drive -- no, looking at the sign; cats couldn't read maps or signs. Mr Dursley gave himself a little shake and put the cat out of his mind."
So you think cats can't read maps, can they, Uncle Vernon?
(And her name wasn't even Professor McGonagall ... well, not that I was ever aware, at least!)
And yes, that is a map of London, too.
I found it impossible to read this without constantly comparing it to the TV show which led me to it.
Plot-wise, the show matches the source only in the broadest strokes. TV has also done what TV and film usually needs to do and cut and conflated characters from the source material. What I didn't really expect is that the changes would lead to more compelling characters with greater depth. It's usually the other way round.
The mysterious phenomenon where-by Rick's moral and practical decision making is immediately shown to be right by events is all present and slightly annoying, though.
Nevertheless, it's an addictive experience and I find myself prepared to shell out the alarming price for subsequent volumes.