year of pub­li­ca­ti­onISBNauthor(s)title
1973978-0-85940-000-8James BuntingFortress of Fear
  ''978-0-85940-001-5Nara LakeSecret Man
  ''978-0-85940-002-2Celia LarnerMiranda
  ''978-0-85940-003-9William HewisonMindfire
  ''978-0-85940-029-9Brian MurphyBusiness of Spying