The Death Dealer by T.M. Cromer

Magical assassin Trevor Blane’s latest assignment should be straightforward, but his intended target brings with her major complications. Battling his escalating attraction to the woman he’s meant to eliminate and the haunting whispers of his conscience, he finds himself deep in a troublesome trench.
Earth witch Soleil Stephens, dedicated to restoring the world’s dwindling resources, finds herself in the crosshairs of those who seek to stop her. From the moment she meets the enigmatic Death Dealer, she knows her time is limited, both in life and love.
Trapped together on the island of a notorious black-market plant dealer, Trevor’s mission takes an unexpected turn as he realizes his true purpose may be to safeguard Soleil, not end her. But he’s cursed with a belief that love leads to death for those connected to the Blane lineage, and he fights his growing feelings for her despite their undeniable chemistry.
Navigating a dangerous dance of desire and deception, they must unravel the mystery of who wants Soleil’s demise and why. Defying fate comes with its own perilous price, and if they dare embrace love, they risk igniting a chain of events that could lead to their ultimate destruction.