The Hook by Victoria Helen Stone

Three betrayed women with revenge in common channel their fury in a twisting novel of psychological suspense by the Amazon Charts bestselling author of Jane Doe and False Step.

A women’s boxing class is the perfect place for betrayed wife Katherine to work out her aggressions. Ideal too for Geneva, a teacher disgraced and ruined by a vengeful ex, and Luz, a software engineer battling an unjust system. Maggie, their instructor and mentor, guarantees she can right the wrongs they’ve endured. And if Katherine, Geneva, and Luz really want to unleash their rage, they must do what Maggie says.
Each woman’s secret task has its risks. Call it justice. Call it revenge. It’s bound to be worth it—if no missteps are made. As they take the leap to reclaim what they’re owed, their lives are turned upside down. Because no one could have guessed that it would all end in murder.

Now, coming together to harness their power, Katherine, Geneva, and Luz fear that the game they’ve been playing is playing them.