The Swiss Appointment

Autumn 1941. Xanthe Schneider is living at Bletchley Park with her young son and hopes the dangerous missions to Berlin and Greece are behind her. Reports of a new encryption technology being manufactured in neutral Switzerland bring British intelligence back to her door. Xanthe is asked to investigate the supply chain and determine whether the device could threaten the Allies’ hard-won cryptographic advantage.

The final Xanthe Schneider thriller shifts the espionage contest into officially neutral territory, where commerce, intelligence and wartime pressure intersect. Boyle uses Switzerland’s precarious position between Axis and Allied interests to explore the ambiguities of neutrality while continuing the series’ central theme of codebreaking and clandestine intelligence.