The Three Swords

Premise

Premise.
The protagonists are
Brian Grant
Tyler Grant
and Reinhart Grant

In this novel, the three brothers discover that they can travel to another land through a portal. In this land, they each have fantastic powers. There are rumors of war brewing in this land among the three main factions who live there. The Sprites, the Monsters, and the Goblins. Each faction relates to one of the brothers so in the end, peace is brought to the land because the Grant brothers never fight with each other, even if they are manipulated by malevolent beings within each faction.

The moral of the story is that if you stick with your family no matter what, you can make it through any conflict.