Mile High Mystery

His secret could get him killed...After she testified against notorious killers, search and rescue volunteer Zach Gregory thought his sister had been killed years ago. But when she's found murdered, FBI agent Shelby Dryden reveals Camille was in the witness protection programme. Shelby is convinced Zach is hiding something. And as threats against him escalate, Shelby must control her burning attraction to Zach while also protecting his life...