Crossing Enemy Lines by Elizabella Baker

A second chance, enemies to lover’s prequel to the Blackguard Security Series.

For years, Daniel hunted his wife. Convinced she betrayed him in the worst way possible. So when he finally discovers she’s working for the enemy, he will stop at nothing to destroy her. Even at the expense of his new team.
After the death of her daughter, Emma gave up everything. Her life, her job. Nothing mattered except stopping the person responsible. Even if it meant hurting those she cared about. With a single-minded focus, Emma became someone new. But past sins have a way of returning.
Can Daniel forgive her long enough to work together, or are there some lines that just can’t be forgotten?

Crossing Enemy Lines is a prequel to the Blackguard Security Series. It contains its own HEA but has an overreaching subplot that will continue into the series.