Dauntless by Kelly Goode

The aliens didn’t invade Earth in giant spaceships as depicted in the movies – they were smarter than that.

Matt Sheridan has been called many things – stubborn, difficult, a loner – and that’s just by the people that like him, but no one can deny he’s a good Invasive Species Control Unit agent. Killing aliens is his life mission, so you think he would recognise one if he sat next to them in a bar.
Aliya Elerson thought her life was mapped out – influential mate, friends, family – but when that’s cruelly snatched away, she’s ventures outside the safety of her colony. She went looking for a distraction and ended up with so much more.
With secrets threatening to tear ISCU apart, how far will Matt go to discover why the beauty in the bar fled his bed and how far will Aliya go to protect her identity? Return to ISCU, where it’s becoming harder to separate the agents from the aliens, and the line between right and wrong.