Deceptive Truth by Olivia Jaymes

“I want you to help me prove that your brother was responsible for my sister’s disappearance.”

Knox Owens can’t believe his ears. Apparently, his new girlfriend had more than romance on her mind when they met. She’d deliberately run into him that night at the bar. She knew who he was. Now she wants his help.
Jenna Waters is desperate. She’s come to the last person that should or would help her, but she doesn’t know where else to turn. Her sister walked out of a coffee shop over six months ago – on the arm of Knox’s brother – and was never seen or heard from again.

If Knox is going to help her, he has two rules. One – she has to be open to other suspects if the investigation leads away from his brother. Two – they aren’t a couple anymore. Feeling betrayed by her subterfuge, he doesn’t want any funny business between them. Of course, she agrees.
But the more time they spend together, the more that second rule is becoming a problem. There’s chemistry between them, even if they don’t want to admit it. The building passion between them isn’t their biggest problem, however. Someone doesn’t want them sticking their nose into this investigation…

And this case is taking a deadly turn.