The world is very simple it's two lands opposed to each other.
Basically one has a very cold environment with the vikings and such. This is where are character is living.
And the other is a mix of every environment with the knights and other kingdoms that may accompany it.
they are separated by a ocean. The knights are in a more advanced age in technology then the vikings due to the materials that they have.
In this world magic does exist but not to the point where it's well known by the vikings. Only the knights have magic and even then the magic that they can command is only given to a tens of thousands of people compared to the millions of people that they have.
If the novel continues their might be more.