Critical Witness by Tara Grace Ericson

A presidential assassin is on the loose, and Hannah is the key to unlocking his identity.
But it’s her own identity that is going to blow up the entire operation—and her future with the hero who saved her.

Ex-special forces commando Will Gilbert is leading a black op tasked with bringing down the presidential assassin. When his team rescues a woman who witnessed the fatal shot, protecting her becomes just as important as finding their target and keeping the entire thing under wraps. Behind those scared eyes, this woman has the answers they need to finish the mission.
Struggling journalist Hannah Stone was in the wrong place at the wrong time. Or was it the right time? A Pulitzer is practically guaranteed if she can manage to escape without being killed. All she has to do is help Will and his team capture the shooter—without revealing her own identity as a reporter. Or just why she was at the hotel that day in the first place.
Pursuing the shooter and targeted by a powerful enemy, Will and Hannah face impossible odds. While her heart is quickly becoming tangled with his, Hannah hides her identity from the man trying desperately to save her.