That's a very good price. Think we paid €22 for our copy.
Found it! (nearly got trojaned in the process -really should wait for the AVG to pre-scan the site before clicking on a link!!) It, the oven not the trojan, was on a Regia Anglorum site http://www.regia.org/life/ovens.htm
Ok, stone and clay oven...
Glad you made me look know as they have a page on glass firing, something else I want to try