Enemy Infiltration - Carol Ericson

She'd lost her brother. Can a jaded Delta Force soldier help her find out why?

Strong-willed Lana Moreno won't rest until she finds out the truth about her heroic brother's death. And neither will Logan Hess, whose covert government mission soon becomes entwined with another goal: protecting Lana. On Logan's Texas ranch, these unlikely partners are fighting to understand what really happened overseas while sparks ignite between them. But their investigation quickly provokes a firestorm of consequences — and attention from all the wrong people.

Warning Shot - Jenna Kernan

When an agent teams up with a local sheriff, she doesn't realise his secret could endanger their lives…

With Homeland Security on high alert, Rylee Hockings heads into the field to thwart a foreign threat. But local county sheriff Axel Trace doesn't want the newbie federal agent treading on his turf. As he learns to accept her help, the stakes rise as he realises he'll have to reveal a secret that could jeopardise her case — and cost them their lives.