The Folding Knife

From Author Wars - https://authorwars.com/publications/the-folding-knife-306839.html

Overview:

Title: The Folding Knife
Author: K. J. Parker
Year: 2010
ISBN-10: 9780316038508
Publisher: Orbit
Price: £12.99
Pages: 432
Binding: Hardcover
Type: Novel
Title Reference: The Folding Knife
Notes: Data from Amazon UK as of 2009-12-25.
This may be a phantom publication. As of 2012-10-02, there is no evidence that there was ever a hardcover edition of this title. The ISBN is from the range of the US division of Orbit. The Amazon.co.uk source shows that it is "Currently Unavailable" (Amazon-speak for "never published".) The trade paperback edition published four months later in the UK is indicated as a first edition.