Her Master of Hearts (Masters Men #3)
Sandra S. Kerns

ADA Ace Masters isn’t certain of anything anymore. With both of his brothers happily married, he’s starting to wonder why he still wants to keep his distance when it comes to a relationship. After an attempt on his life, he remembers why. He may not be a cop or in the military, but some folks don’t take kindly to being put in prison. And Ace is very good at doing just that. He tries to renew his determination to remain unattached.
Unfortunately, the only person he trusts to help him figure out who is targeting him is Gina, the one person who knows how to push his buttons. Having her close by all the time has him forgetting to keep his distance both physically and emotionally. And that has placed a target on Gina’s back as well. Can he stop the person aiming for her, or will he lose her because he’s afraid to take a chance?