book cover of The Darkest Mercy
 

The Darkest Mercy

(2026)
(The second book in the Valentino Kings series)
A novel by

 
 
She saw him kill a man. He made sure she'd never forget him.

Gemma is a trauma nurse who knows what blood looks like. But nothing in the ER prepared her for Marco Valentino — scarred hands, dead-calm eyes, and the kind of violence that doesn't apologize.

When she witnesses something she shouldn't, Marco does what enforcers do: he takes her. Not to silence her. To protect her. Because the people who want her dead won't stop, and Marco has decided that keeping her alive is worth burning down everything else.

She heals people. He destroys them. They shouldn't work.

But Gemma doesn't flinch at his scars, and Marco can't stop showing up at her door at two in the morning, bleeding and pretending he doesn't need stitches. She's the first person who's ever looked at his hands and seen something other than weapons.

When the threat against her turns into a war that puts the entire Valentino family at risk, Marco will have to decide how far he's willing to go for a woman who was never supposed to be his. The answer is further than anyone expected — including him.

The Darkest Mercy is a full-length standalone mafia romance with a grumpy protector hero, a strong heroine, explicit steam, and an HEA. Book 2 in The Valentino Kings series.


Genre: Romantic Suspense

Used availability for Sienna Marchetti's The Darkest Mercy


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