I did a quick skim-read of your book, so this may not apply to everything. Your characters are very well-developed, and the plot seems intriguing, but I think your weakness is in the setting. When I read, I can't really picture any sort of place in my head where this story might take place. I know description of the setting takes away from some of the plot, but so far, the novel seems more focused on just an exchange of dialogue (which feels somewhat rushed, but that could just be me skim reading). Anyways, work on your exposition and transitory scenes. Sorry if I was too critical. I'm still new at this.