Cold Case Tracker - Maggie K. Black

A missing sibling. A targeted witness. A K-9 on the case.

K-9 officer Jackson Locke's sister has vanished - and the key to finding her lies with Amy Scout...his sister's best friend and his old crush. But when Amy comes under attack, two things become clear: Jackson's sister has been investigating cold cases and someone wants Amy dead. Now he must untangle the mystery between the cold cases and his sister's disappearance while guarding Amy from an enemy willing to kill to hide the truth...

Her Duty Bound Defender - Sharee Stover

Threatened and falsely accused...she'll need this K-9's protection.

Only seconds after widowed mother-to-be Naomi Carr-Cavanaugh is rescued from two masked gunmen, she's accused of multiple murders. Detective Bennett Ford believes he's finally apprehended the Rocky Mountain Killer - until Naomi is attacked again. Now she must rely on Bennett and his K-9 partner for protection. But with threats closing in, she'll have to prove her innocence first in order to stay alive...