This book is a literal clone of Eragon. There's even a magically twisted humanoid demon thing called a Fade. You know, like, a Shade.
So many details feel straight out of Eragon, that's just one example. From overarching plot to small details. So if that kind of thing bothers you, stay far away.
As for me, when I find a story I like, I'm quite happy to read more like it. Despite so many almost laughable similarities, I adored Of Blood and Fire. It's fun, well written, and it felt a bit like coming home.
The first 50-100 pages were on the slow side, but then it picks up and never stops. I was hooked! I'll absolutely be continuing the series.