Scoundrel by Bernard Cornwell

Paul Shanahan, the owner of a yacht delivery business in Belgium, now lives a peaceful existence after a terrorist-active life. An old colleague's request for the secret transport of a large amount of gold is a welcome return to the fold - but it turns out to be a deadly business.

Bernard Cornwell OBE is an English author of historical novels and a history of the Waterloo Campaign. He is best known for his long-running series of novels about Napoleonic Wars rifleman Richard Sharpe. He has also written The Saxon Stories, a series of thirteen novels about the unification of England.