Mortal Ties — Eileen Wilks

FBI agent Lily Yu is living at Nokolai Clanhome with her fiancé, lupi Rule Turner, when an intruder penetrates their territory, stealing the prototpye of a magical device the clan hopes will be worth a fortune--if a few bugs can be worked out...

But the protoytpe can be dangerously erratic, discharging a bizarre form of mind magic -- and it looks like the thief wants it for that very side effect. Worse, whoever stole the device didn't learn about it by accident. There's a Nokolai traitor in their midst.

Lily and Rule have to find the traitor, the thief, and the prototype. One job proves easy when the thief calls them--and his identity rocks Rule's world.

As they race to recover their missing property, they find Robert Friar's sticky footprints all over the place. Robert Friar--killer, madman, and acolyte of the Old One the lupi are at war with--an Old One whose power is almost as vast as her ambition to rock the entire world...