Sweet Venom Of Time by Sara Samuels

In a world where time is both a weapon and a curse, and shadows whisper of betrayal, Elizabeth Alexander’s destiny was written in blood—but she was born to defy it. As the daughter of England’s most ruthless Timehunter leader, Elizabeth’s life has been shaped by deception and power. Yet everything changes when she crosses paths with Amir Hassan—a vengeful shadow sworn to dismantle her father’s empire, piece by bloody piece.
Amir has spent years as a force of destruction, hunting the leaders of the Timehunter Society in the name of justice. But his mission falters when fate entwines him with Elizabeth, the daughter of his greatest adversary. Their connection is forbidden—a volatile spark in a world already teetering on the edge of chaos.
As Elizabeth and Amir conspire to bring down the Timehunter Society from within, they find themselves ensnared in a dangerous web of deadly secrets and treachery. Their forbidden love becomes their greatest strength—and their deepest vulnerability—as enemies close in and the shadows threaten to consume them.

In a world where loyalty is bought with blood and secrets can shatter empires, Elizabeth and Amir must decide—Will they fight for their love, or will the darkness of their pasts destroy them both?