I first likened this to Fifty Shades, but extremely well-written, unlike Fifty. About halfway it veered off into its own actual story, and I liked that too.
My pet peeves: Gabe changed. I know, I know, character growth and all that. But I really liked him at the beginning then he got a bit dull. I also disliked the conflict with Charles that felt really thrown in there.
Generally liked it, and excited to read the next.