To anyone who enjoyed Fernand Braudel’s masterly work on the Mediterranean or Neal Ascher- son’s wonderful Black Sea, the idea of a book on the Baltic is an appealing one. It is Europe’s other great inland sea, fed by the snows of Scandinavia and rivers such as the Elbe, the Vistula, the Niemen and the Neva, ringed with cities such as Copenhagen, Stockholm, Helsinki, St Petersburg, Riga, Gdansk and L