Finally, the book lacked any resolution. We follow Fever (the title character) as she leaves the place she was raised among emotionless scientists, learns about her mysterious background and begins experiencing strange memories (which we later discover belonged to her nonhuman grandfather), then finally learns who her parents were. And then there's an attack on London. And then the mayor of London and the attack leader have a fistfight. And then Fever's brain implant gets zapped and she stops having someone else's memories. And then she gets in a boat and leaves. And then she philosophically wonders who she really is and who she wants to be. The end.
I think the book was trying to portray war and prejudice in a negative light. There certainly was enough of both in the book - humans tried to destroy the superhuman mutants, and then the superhuman mutants retaliated and brought war against the humans. But that message was haphazard at best, unresolved, and so buried under the author's overimagined future world that it was obscured.
I didn't like it.