There are few experiences more liberating than pleasure-seeking on a cruise ship. As the anchors are raised, so the inhibitions are dropped. As a veteran travel writer with more than 200 voyages under his belt, DC Wishart can fairly claim to have seen it all. This saucily comic romp across the dance floors, through the bars and between the cabin sheets is a vividly authentic account of the cruising and schmoozing lifestyle. But there is more to Girl on the Gangway than that. Wishart's tale has a sombre undercurrent. Cathy Robertson's Vietnam War pilot husband is still, after ten years,...