Old enemies - Michael Dobbs

In the Swiss Alps a teenage girl is thrown from a helicopter and her boyfriend is brutally abducted to Trieste, a city filled with undercurrents of past hatreds.
Ruari, son of Irish media owner J J Breslin, is in desperate danger, at the mercy of ruthless kidnappers making impossible demands. His terrified mother contacts the only person she knows can help her son: Harry Jones, her former lover, who she walked out on many years ago. Now memories of their passionate affair, the guilt, hurt, anger and humiliation, come flooding back.
Time is running out for Ruari and Harry, torn between his loyalties, is quickly drawn into a political game played for high stakes. Far higher than he realizes...