This is book number 1 in the Vinland Saga series.
“Gripping doesn’t begin to describe Vinland Saga. 5 stars.” –ICv2
“The art is gorgeous, a combination of beautiful cartooning and realistic backgrounds. Yukimura is also a master of pacing, both in frenetic battle scenes and charged emotional moments.” –Faith Erin Hicks
“Deeply engrossing… If you have any interest at all in Vikings, the Medieval period, or pirates, this is not a series you want to miss.” –Anime News Network
“For those who love Berserk, you’ll love this too.” –Manga Bookshelf