Melantha (Mansion of the Weeping Wings Book 1) by V.A. Smith
Vivica, a wealthy widow, is haunted by her late husband, Nils. When a mysterious figure appears, they travel to a magical realm and meet Melantha, a brave princess who has been alone since her family was brutally slain by a vampire-like creature. Now, with courage and determination, the trio must battle to save their world from the darkness that threatens it. Will they succeed or be consumed by the evil that lurks in the shadows?