The Last Enemy, Book 1, Lonesome Lawman Series (Electronic book text)

Romantic Suspense/Thriller: Two men need her. One needs her dead. Betrayed by those who were supposed to protect her, romance author Dani Gwynne is plotting her own survival, working against time, terror and her fear of heights in the mile high city of Denver. Deputy U.S. Marshal Matthew Kirby is the lonesome lawman in charge of finding Dani. Hunting is what the Marshals do best and Matt is their top tracker, but even he hasn't been able to close the law and disorder gap with an elusive killer who's never missed his mark.