Bump Start by Eve Holmes

When control slips and chaos calls, some collisions are inevitable.
Cade Cormier is a brilliant quantum mechanics professor who can easily explain how energy behaves in the universe. But he can’t explain its absence within himself. Numbness has become his only constant, and he’s chased every force he can find to push back against it. But when drinking and self-destruction leave him emptier than ever, a different kind of force comes crashing into his orbit, and sets a collision in motion.
Alder Roy has spent his life balancing control with chaos—and bleeding for both. As Vice President of New Brunswick’s outlaw motorcycle club, the Basin Kings, he’s built his reputation on fear, loyalty, and danger. But when a rival club starts pushing in, threatening to drown the province in the kind of violence the Kings don’t want on their soil, Alder is prepared to do whatever it takes to protect what’s his. And that includes Cade.
As Cade’s hunger for danger grows, Alder’s obsession with him deepens, and each crack in Cade’s walls gives Alder more to protect… and more to lose. One fights to hold his world together while the other tears his apart—each driven by forces they can’t control.
In New Brunswick, where powerful tides transform landscapes in hours, winding roads cut through unforgiving forests, and cliffs crumble, nature doesn’t wait for permission—and neither can they.
They could be the force that holds each other up against the pull of destruction.
They just need to find balance in the collision.