Last week, I ended my book tour with an event at Elliott's in Edinburgh for the city's book festival. These tastings usually take place on a week night, so I tend to opt for three easy-drinking favourites. A kabinett riesling? Check. A fruity cotes du Rhone? Check. Then I spied a lambrusco. I love starting the evening with a joyous glass of something fizzy but, to my surprise, many members of the audience remarked how they didn't have the best memories of lambrusco.