Visiting a villa built by Lorenzo de Medici outside Pisa, David Gilmour fell into conversation about the unification of Italy with a distinguished former minister: ""You know, Davide," he said in a low conspiratorial voice, as if nervously uttering a heresy, "Garibaldi did Italy a great disservice. If he had not invaded Sicily and Naples, we in the north would have the richest and most civilized state in Europe." After looking round the room at the other guests, he added in an even lower voice, "Of course to the south we would have a neighbour like Egypt."" These words stayed in the author"s mind for a long time. The dream of a unified Italy, how and why it has never been more than a dream, became the subject of a book he has been thinking about and writing for the last twenty years. Was the elderly Italian right? "The Pursuit of Italy" traces the whole history of the Italian peninsula since the Romans in a wonderfully readable style, full of well-chosen stories and observations from...