Books on Britain as a Roman Province

I hope it is ok for me to make this request here. I'd like to start a Casse campaign, but I don't know much about them, or the general situation in Britain. I'm looking for books on Britain prior to and under Roman rule from Julius Caesar's invasion until Nero's death. Particularly I'm interested in Roman policies toward the province, and the Celtic tribes prior to invasion.

Thanks for any and all help.

I hate to bump this, but I'm going to have quite a bit of time tomorrow at the library, so please give me some books!

One I've got here is Roman Britain by Keith Branigan. It's big, got pretty pictures but is kind of old and possibly outdated (I inherited it from my grandfather), so it almost certainly isn't the best recent work. It does however cover the subjects requested.