Martyn V. Halmauthor : Martyn V. HalmMartyn V. Halm Book SeriesPeccadillo - A Katla Novel (Amsterdam Assassin Series Book 2)Microchip Murder - A Katla KillFile (Amsterdam Assassin Series)Fundamental Error - A Katla KillFile (Amsterdam Assassin Series)Locked Room - A Katla KillFile (Amsterdam Assassin Series)