"In August 2009 the XXIst International Limes (Roman Frontier Studies) Congress will be held at Newcastle upon Tyne. It is now standard practice for the organisers to produce a guide or handbook to the military sites in the country or region where the Congress is being held"--P. iii.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
The Roman army in Northern England by Paul T. Bidwell. ISBN 0905974883. Published by Arbeia Society, on behalf of the Organising Committee of the XXIst International Limes (Roman Fronti in 2009. Publication and catalogue information, links to buy online and reader comments.
