Melantha by V. A. Smith

In "Melantha," Vivica's world is turned upside down when she's haunted by the ghost of her late husband. But when a mysterious stranger enters her life, she's transported to a fantastical realm where she meets Melantha, a brave princess fighting to save her realm from a bloodthirsty monster. Together, Vivica, Melantha, and their new ally must use all their strength and courage to defeat the evil lurking in the shadows - or risk being consumed by it forever. Will they triumph over darkness, or fall victim to its deadly embrace? Find out in this gripping, otherworldly tale.