The German Government used 90% of James Vincent Murphy's rough draft translation of Mein Kampf to form the body of an edition to be distributed in the UK once Operation Sea Lion was completed. This 'Operation Sea Lion Edition' was finalised and printed in the summer of 1940. Once the invasion was called off by Adolf Hitler most copies were distributed to english speaking POW camps. Original copies are very rare and highly sought after by serious book collectors interested in military history.