Anyone interested in the Scotcats should readBritain BC by Francis Pryor. I know Jamie's got it listed on the BHP website, but no one has mentioned it in here I think. Its an easy to read overview of the archaeological record of Britian and Ireland 'Before the Romans'. He writes with passion but also with levity and toward the general reader, not the academic crowd, so its not a slog to get through. There is also a BBC tie-in 2 part TV documentary from the BBC that you can find on You Tube (at least here in the US we can). You can tell he has a long passion for his work but doesnt take it too seriously. Give it a try!