The Thin Gold Line by Jillian James

For the last three years, Travis Kaplan has always been just a number…a badge number, that is. The deep, sexy voice on the other end of the police radio who can dish it as well as he can take it; he’s a coworker, a friend, and a serious flirt.
9-1-1 dispatcher Emilia can’t help but find herself feeling more and more connected to the man she’s never met, and as she does, things get complicated.
As their friendship grows clouded by increasing desire, will they be able to remain professional and stay just friends? Or will Emilia find herself losing her job—and her heart—in one fell swoop?