Have just discovered that apart from the discount mentioned in the first post on this thread, Imperial Spy is also a part of the 3 books for £12 deal currently being offered on a large number of books at the moment. If you're interested in this, then you can find Imperial Spy here:
http://www.amazon.co.uk/exec/obidos/...610925-9430066
and the main page for navigating the offer here:
http://www.amazon.co.uk/exec/obidos/...610925-9430066