Jack Harvey 1 - Witch Hunt (1993)

Interpol have tried and failed to find her. Now the combined forces of
Scotland Yard and MI5 must try the impossible to prevent a major
international incident. Dominic Elder carries her autograph wherever he
goes. Witch is his passion, his obsession. And being retired is no bar
to his willingness to restart the hunt. MI5 know that the man who wrote
the Witch file is the key to catching their quarry. But the truth isn't
easy to spot. And it is only when an MI5 novice and his French
counterpart piece together the smallest of clues, that Witch suddenly
looks vulnerable . . .