Threat detection : Defending the witness / Sharon Dunn, Sharee Stover

Defending the witness / Sharee Stover - To catch a killer...she must trust her protectors. After witnessing a murder at the hands of a notorious gang leader, Ayla DuPree's is a marked woman sent straight to witness protection. But when her handler is killed and her safety compromised, she has no choice but to run - forcing U.S. Marshal Chance Tavalla and his K-9 to chase her. Can Chance keep Ayla alive long enough to find safety and justice?

Threat detection / Sharon Dunn - Can a K-9 team stop an assailant with a deadly plan? When someone shoots at volcanologist Aubrey Smith on Mt. St. Helens, it's up to K-9 officer Isaac McDane to protect her even though she broke his heart a decade ago. But as people keep dying and signs point to Aubrey's sister being involved or the potential next victim, they'll have to work together to track down the killer before he finishes his hit list.