The Power of the Dog by Thomas Savage

Read the book then see the superb film adaptation by Jane Campion starring Benedict Cumberbatch.
 
Thomas Savage’s dark poetic writing about bachelor brothers in a small town in early 20th century American will hook you in.
Phil and George are brothers and joint owners of the biggest ranch in their Montana valley. 
Phil is the bright one, George the plodder. Phil is tall and angular; George is stocky and silent. Phil is a brilliant chess player, a voracious reader, an eloquent storyteller; George learns slowly, and devotes himself to the business. 
Phil is a vicious sadist, with a seething contempt for weakness to match his thirst for dominance; George has a gentle, loving soul. They sleep in the room they shared as boys, and so it has been for forty years.
When George unexpectedly marries a young widow and brings her to live at the ranch, Phil begins a relentless campaign to destroy his brother's new wife. But he reckons without an unlikely protector.
From its visceral first paragraph to its devastating twist of an ending, The Power of the Dog will hold you in its grip.
 
WITH AN AFTERWORD BY ANNIE PROULX
 
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‘With its echoes of East of Eden and Brokeback Mountain, this satisfyingly complex story deserves another shot at rounding up public admiration' Guardian