Sea-change by
Philip Loraine starts off what seems to be a standard case of a missing person in Spain but slowly builds into a full blown Cold War spy drama in central Europe as more and more is revealed about some the main characters. This is a very well written story with various layers of intrigue and really conveys the world of secrecy, disguise and double lives of top level espionage. Even those nearest to them cannot know the truth.
A highly entertaining book, not sparing some of the cruelties of this way of life. The question is though, is it a crime novel and thus should be in the Collins Crime Club? Well the club did have tales covering a wide variety of criminal activity even the paranormal so why not the international spy game, which includes plenty of criminal activity! It is a great read anyway.