A retired engineer who worked on blueprints for Hong Kong's Tsing Ma Bridge has written a thriller in which the landmark is targeted for destruction in an al-Qaeda terror plot. Frank Worsdale, a senior railways consultant involved in planning the Lantau link, describes the suspension bridge as 'Hong Kong's twin towers' and says his book, Martyr's Bridge, is a warning to security officials. The 74-year-old who lives in Edinburgh, Scotland, worked on feasibility studies in the 1980s as engineers decided whether to build a suspension bridge or tunnel to link Lantau with the New Territories. 'My book is fictional, but the bridge is Hong Kong's twin towers and I think the idea drifted into my mind because of that,' he said. 'I think the book would act as a possible warning to people who are responsible for security. It could also give people ideas, I suppose, but it is better to know about these dangers than not to know.' The book tells the story of an engineer who converts to Islam and is recruited by al-Qaeda to destroy the bridge in the aftermath of the September 11, 2001, attacks. It describes how he plans to blow up cables on the west-end tower to cause the bridge's total collapse, how security services are subsequently wrong-footed and the government embarrassed as it tries to deal with the crisis without informing Beijing. Worsdale said he got inspiration for the novel in 2002 when he visited the bridge and an exhibition about it. Martyr's Bridge is his second novel set in Hong Kong. Both were published by Singapore-based Talisman. Another book published recently is a politically charged novel by a Canadian dairy farmer's son living in Hong Kong which depicts pro-democracy riots in the city. Titled High Degree of Atrocity and carrying the slogan 'One country, two bullets', Jay Scott Kanes' novel tells of a political assassination during a street rally that triggers an international crisis.