The end of the world was this island. The Roman Empire made this their outpost. H.H. Scullard in his book titled: "Roman Britain Outpost of The Empire" is a very readable text which gives this theme its due. Of course, beginning with the Celts, he gives a general overview of the island from this time frame.
With 125 illustrations and 5 maps, a number of topics are presented. They are by chapter title:
Britain and the Celts
Caesar and the native kingdoms
Conquest, occupation and Romanization
Defence : The second and third centuries
Military and civil administration
Life in the towns
Villas and countryside
Language, art and religion
The end of Roman Britain.
First published 1979 by Thames and Hudson Ltd, London, it was printed in Great Britain by Jarrold and Sons Ltd, Norwich. It is a wonderful read for the time traveler.