In binder. - 7 sheets (ill., map, facsim) in pocket.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Historic towns. ISBN 0859671828. Published by Scolar Press for the Historic Towns Trust in 1974. Publication and catalogue information, links to buy online and reader comments.
obnb.uk is a Good Stuff website.