This was one of the books in the series I could've done without. I found it kinda meh & couldn't really get into it. If it wasn't for Acheron & Nick then I would've given it maybe 1 star. Seeing some of the other characters was nice too. I just couldn't get into Ren & Kateri or their story line. I found that they were a little flat & I didn't care enough about them as characters to not want to stop reading. To me, this book didn't add anything to this series. I still love this series though!