Not a bad book, but not a great book either. The world-building's interesting enough, and I liked the idea of the magical 'Houses', but it feels like IA is reusing characters, and sometimes scenes, from her other books. Rogen is simply Curran with a new skill set. If you want more of the same from IA, then yeah, the book'll probably work for you. If you want fresh and original, it might feel a little flat. 
 The story's a fairly quick read, but it's one of those books that, once I put it down, I didn't think about it at all until I picked it up again. I want a book that leaves me musing on the characters, and wondering what might happen next. I don't need to ponder here. I can almost predict exactly how the whole series will play out. However, if comfortable and familiar is what you want, you'll probably love it. 
 Overall, it's about a 3.5 star read for me, but I always try to be more generous with first books in a series, as they've more work to do. Therefore I'm (somewhat grudgingly) rounding up to four stars.