Loss hardened him.
Vengeance may destroy him.
From Wall Street Journal & USA Today bestselling author Kristen Hope Mazzola comes a brutal, high-stakes motorcycle club thriller set inside the world of the Unacceptables-where brotherhood is law, and justice is taken by force.
Holt Walsh learned early that life doesn't give second chances.
At fifteen, he lost his mother.
In one night, he lost his innocence.
In one moment, he crossed a line he could never undo.
The Unacceptables became his family.
The road became his home.
And loyalty became everything.
Now, decades later, their president is murdered.
No witnesses.
No accident.
No mercy.
War is coming.
As Holt and the club hunt for the truth, another bomb detonates in his life-
A nineteen-year-old stranger shows up at his door...
And claims to be his son.
Ryder is reckless.
Untested.
And completely unprepared for the world Holt lives in.
But when evidence points to rival clubs and betrayal from within, Holt makes an impossible choice:
He sends his son undercover.
Into enemy territory.
Into violence.
Into a world that destroys men.
Because the truth is worth any price.
Even blood.
Even family.
UNSTABLE is a dark, fast-paced MC thriller about revenge, brotherhood, and the cost of loyalty-told through the eyes of a man forced to choose between justice and the one thing he never knew he had.
It is NOT a romance.
Perfect for readers who love:
- Motorcycle club crime thrillers
- Undercover infiltration plots
- Found family brotherhood
- Vigilante justice stories
- Father-son emotional arcs
- Revenge-driven suspense
- Dark outlaw fiction
- High-stakes moral dilemmas
- Gritty, realistic action
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