The Kingdom by Jo Nesbo (Kongeriket #1)

TWO BROTHERS. BOUND BY BLOOD...AND A LIFETIME OF SECRETS.

When Roy and Carl's parents die suddenly, sixteen-year-old Roy is left as protector to his impulsive younger brother. But when Carl decides to travel the world in search of his fortune, Roy stays behind in their sleepy village, satisfied with his peaceful life as a mechanic.
Some years later, Carl returns with his charismatic new wife, Shannon - an architect. They are full of exciting plans to build a spa hotel on their family land. Carl wants not only to make the brothers rich but the rest of the village, too.
It's only a matter of time before what begins as a jubilant homecoming sparks off a series of events that threaten to derail everything Roy holds dear, as long-buried family secrets begin to rise to the surface...