This was just an okay book for me. Dev was never a big mention and suddenly he gets his own story, so that didn't made me excited to read it. But Katya made things really interesting after I realised she had more to this story than my first thoughts.
So things were a little weird, like Katya sudden urge to go north, and that didn't got a good explanation either. I wanted to know more about her getting back to life experience, but will get to that in the next books for sure.
This these as couple were okay for me, but not that different like the psy and changeling relationships. I liked Katya better and Dev was really boring, even with his powers.