• The Berlin Memorandum // The Quiller Memorandum
    1965/Espionage
  • Rook's Gambit
    1955/Mystery
  • Pawn in Jeopardy
    1954/Mystery
  • Bishop in Check
    1953/Mystery
  • Queen in Danger
    1952/Mystery
  • Knight Sinister
    1951/Mystery
  • The 9th Directive
    /General Fiction
  • The Volcanoes of San Domingo
    /General Fiction