Bad Bishop by L.J. Shen

The first book in the new dark and decadent Society of Villains series, this is a dark age-gap mafia romance . . .

He's Deathless. She's trying to find a reason to live.

Lila

My innocence was ripped from me one fateful night under the starless sky.
Resulting in an unwanted teenage pregnancy and a secret the Camorra must bury.
My father decided to hand me off to the highest bidder.
The lucky winner? Tiernan Callaghan, psychopath extraordinaire.
The Irish mafia prince wants me for all the wrong reasons.
Alliance. Money. Prestige. War.
I am but a pawn in his twisted game.
The man who sits on a throne of his enemies' skulls thinks I'm a weakling.
Little does he know, in this chess game, the underdog wins.
Because the thing about bad bishops?
They protect good pawns.