Barry Cunliffe 
Iron Age Communities in Britain [PDF ebook] 
An Account of England, Scotland and Wales from the Seventh Century BC until the Roman Conquest

Since its first publication in 1971, Barry Cunliffe“s monumental survey has established itself as a classic of British archaeology. This fully revised fourth edition maintains the qualities of the earlier editions, whilst taking into account the significant developments that have moulded the discipline in recent years. Barry Cunliffe here incorporates new theoretical approaches, technological advances and a range of new sites and finds, ensuring that Iron Age Communities in Britain remains the definitive guide to the subject.