I really enjoyed reading this book. I was pulled in by the book description talking about superheroes and the Harrowers. But while I didn't really understand what Harrowers were until I read the book (view spoiler)[ think of something like demons and the like (hide spoiler)], the main character Audrey having powers was the intriguing part. 
 And for some reason, I read somewhere about her best friend Gideon and Leon (her mother's attractive sidekick) and I just thought that it was going to be another love triangle between them but I was wrong, which I am glad for because sometimes I really hate it when authors write love triangles, unless they're exceptionally written. And I honestly didn't see it coming- (view spoiler)[the whole Leon being her Guardian and having to protect her but not only because it was his job his Calling but because Leon actually loves/likes her! (hide spoiler)] 
 Also, because we're so used to reading books about the main character being a normal person suddenly gaining powers, I thought that Audrey was the Remnant (view spoiler)[a Kin girl who has the power to unleash the inhabitants of the Beneath (hide spoiler)] but they claim that she isn't. (I still think that she is special and has some hidden powers and not just because her blood can unseal Verrick but because I still believe that she's the Remnant). 
 A great book, really looking forward to the sequel Burn Bright. (view spoiler)[(and hopefully more romance between Leon and Audrey!) (hide spoiler)]