I liked Sunbolt; it was a very entertaining read. The characters were great, and well-developed considering how little we see of some of them. There was just enough world-building, there was action, there was everything. EXCEPT the length. This wasn't a book that was "super amazing omg and the only thing I didn't like was that it ended!" No, this is the beginning of a book. It doesn't read like a book in and of itself. It reads like a book that cuts off 1/3 of the way through. Be prepared for that. It doesn't, however, end on a cliffhanger, so at least there's that. 
 One thing that the author did remarkably well was incorporate the characters' races into their descriptions. Our main character is clearly Asian, and stands out among her peers because of it. The Ghost is black, etc. It's mentioned and kept up in little phrases here and there, so you can really clearly envision the characters. It's so easy to just picture everyone in a book as the same. Usually when authors try to diversify their characters, they just mention the race once or twice, and it seems like an annoyance more than anything. This author did a really nice job of painting a colorful cast of characters, without whitewashing everything. 
 The story itself is well-written and very interesting. The world the author sets up is full of magic and monsters, including vampires, werewolves, and "breathers." The character relationships are interesting and full of potential, especially that between Hitomi and Val. 
 Overall, it's an interesting story with a lot of potential, but it would have been better if the author had waited to collect more of the story before releasing the book.