The Darkest Whisper
Bound by the demon of Doubt, Sabin unintentionally destroys even the most confident of lovers. So the immortal warrior spends his time on the battlefield instead of the bedroom, victory his only concern... until he meets Gwendolyn the Timid. One taste of the beautiful redhead, and he craves more.Gwen, an immortal herself, always thought she'd fall for a kind human who wouldn't rouse her darker side. But when Sabin frees her from prison, battling their enemies for the claim to Pandora's box turns out to be nothing compared to the battle Sabin and Gwen will wage against love....
Man-woman relationships, Science Fiction & Fantasy, Paranormal, Fiction, Immortalism
Gena Showalter
Gena Showalter is a bestselling author of over thirty books in paranormal and contemporary romances, as well as young adult novels. Her novels have appeared in Cosmopolitan Magazine, and Seventeen Magazine, and have been translated all over the world. Source: Goodreads.com 
"Gena Showalter (born 1975 in Oklahoma) is an American author in the genres of contemporary romance, paranormal romance, and young adult. Showalter sold her first book at the age of 27, and has published over 25 books." - Wikipedia