Asterix and the great crossing, paperback/rene goscinny

Out at sea fishing, Asterix and Obelix are blown off course in a storm.

Luckily they land on the shores of a Roman colony - or is it? Teepees, totems, gobbling birds: its not what theyre used to.

And what are the Viking explorers in their longship doing? But perhaps 50 BC is a little too early for a voyage of discovery to this strange New World.