I did enjoy the story. Because of other activities it took me two days to read Defying Darkness and when I was not reading I found myself thinking about the story.
The protagonists are, Maire, a vampire who has retained her soul, and Dorian, a vahmpyr who are born not turned and fight against soulless vampires. Maire has never killed so has retained her soul for many hundreds of years but by doing so has starved herself. Dorian in finding her discovers she still has her soul. As a Ranger it is his job to protect and free innocents and newly turned vampires who have not killed.
Much of the first few chapters were devoted to keeping both the Maire and Dorian alive through vampiric feeding. Once they were both in good health the quest to free her from the bonds of her vampire sire began in earnest.
Dialog in the book is heavy on dialect with conversations written with a heavy brogue. Some people may not find this writing style easy to read. After awhile I just found myself interpreting in my head. Many Gaelic words were used and the meaning was given in the narrative.
Toward the latter part of the book there was an encounter with another kind of character that was a bit slow because so much had to be explained. Once past that part the plot wrapped up in an exciting action packed conclusion.
I liked the plot and characters and give this one four stars.