Vinland Saga Omnibus, Vol. 1 by Makoto Yukimura

The Viking invasion of London has reached a fever pitch, and Askeladd and Thorfinn rush to take part in the carnage! Their goal is the capture of Cnut, the son of King Sweyn Forkbeard and heir to the throne of Scandanavia and the Danelaw. But standing in their way is Thorkell, one of the Viking world's most daring warriors. The defeat of a living legend will be a formidable test of Askeladd's cunning and Thorfinn's ruthlessness, and of their ability to set aside personal grudges and fell a common enemy!

Manga about vikings…

This can be a good introduction to manga, especially if you like viking setting. The story has some nice features like a gradual unveiling of the situation through the whole volume and giving the reader just enough information to be intrigued. And of course interesting characters.

The art sometimes is almost as good as in Berserk—can be very detailed, shows the chaos of epic battles with a lot of sounds and things happening—,but it often has too many anime features, like faces. It’s also great at portraying snow—falling or covering everything—, seas, storms and auroras which looks unusual in black and white. The addition of maps is very nice and the action is fast-paced and has some anime features.