The modern travel guidebook genre is usually traced to Arthur Frommer's seminal 1957 book Europe on 5 Dollars a Day, but tips on making the most of your time abroad have been published in some form or another for centuries. A 13th century Viking travel guide, for example, highlights some of the potential pitfalls of visiting Scotland. A nifty story in the Telegraph points out that the Norse Vikings, as fierce as they may have been, were no match for some of the rougher tribes of Scotland and Ireland, who were said to butcher invaders on arrival. ]]>