This series isn't bad, but it's not great either. It probably could have been a duology instead of a trilogy. While the story does flow alright, it feels half-baked. Maybe less than half. The ending is unsatisfying and feels rushed, like it needed to be wrapped up on a time crunch. The grammar and syntax is still lacking, honestly I felt like I found more proofreading mistakes in this last book than the first two. It does not seem like Bri has any character development, rather it feels like the series dragged her along kicking and screaming.
--Spoilers--
I don't understand why the losing/blackening of her soul is included if the complications from it were going to be time skipped and then resolved in a page or two right at the end. I also don't understand how Bri never puts two and two together, ever. She has to be told literally everything. When she got the rune tattoo, the artist warned her that using dark magic would cost her 10 fold. That is never brought up again. Instead, it's Sophie telling her that black magic damages the soul, and Morgana confirms that. Gavin never brings up the warning despite standing right there when it was said. It was like that whole thing was forgotten about until the last second.
That was my main sticking point. I don't hold paranormal romances to very high standards because a lot of them are the same. I like the love plot points, that's what I read them for. However, this series is one of the only ones that has frustrated me like this. The more I think about it, the more frustrating it is. The relationships aren't fleshed out at all, which made it not so fun to read and made the plot holes that much more obvious. It doesn't help that Bri is a whiny dimwit the whole way through. It all compounded into an unsatisfying story that could have been really good.