The Colton Ransom by Marie Ferrarella

Former cop Trevor Garth left the line of duty but his instincts are sharper than ever when crime strikes the Colton ranch. As ranch security, it's his job to step in.

Mistaken for a Colton heiress and stolen from her crib, Trevor's daughter is in the hands of a killer out for ransom. Desperate for an ally, he must rely on Gabriella Colton. Now, when every second counts, their dangerous investigation draws them closer to each other...and their darkest threat.

The Paris Assignment by Addison Fox

It was obviously an inside job. Security expert Campbell Steele would have to get very close to his new client – CEO Abigail McBane – to uncover the traitor.

Suddenly they are posing as lovers and jetting off to a conference in Paris. The stakes keep rising as they soon realise it isn't just her company the traitor wants, but Abby herself. But Campbell isn't prepared to lose her...