One bit of advice: PPL Confuser.
I read the Pooley's book but learned much more from the PPL Confuser. It's out of date now but it helped me immensely and I only did the air law exam last year.
The problem is that you can't buy it any more. I'd be happy to hand over the cover price to the copyright holder but it's not possible. You could try Googling - there are PDF versions of it kicking around on the Internet.