Sorted on book title (not in series order)

J.M. Dent & Sons

The Final Count

Robin Gaunt's new invention was terrifyingly, unimaginably powerful: a weapon of chemical warfare which caused "universal, instantaneous death". When Gaunt disappeared from his rooms, leaving no trace but a faint bitter smell, the police suspected that he had sold out to the other side....Read more

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4

A Sort Of Traitors

A gripping story of treachery set in a scientific laboratory in post-war London

Professor Sewell and his biological research team had spent years developing new methods of controlling epidemics. Now a smooth-talking government minister was refusing to let him...Read more