Mile High Mystery by Cindi Myers

His secret could get him killed…unless she can protect him.

Search and rescue volunteer Zach Gregory thought his sister had been killed years ago after testifying against notorious killers. But when she’s found murdered, FBI agent Shelby Dryden reveals Camille was actually in the WITSEC program. Shelby is convinced Zach is hiding something that’s made him a target. As threats against him escalate, Shelby must control her smouldering attraction to Zach while protecting his life.