I enjoyed the book and I loved the fantasy idea which was very original and a welcome change to the overkill of vampires, werewolves etc. which are trolling the world. 
 I really liked the protagonist, Isobel (not just because she has the same name- we really are all awesome though) because she demonstrated that just because she was a cheerleader and popular didn't mean she was shallow and had to sell out on all her morals. She also had some incredible character development as she got shunned. 
 The tension between Varen and Isobel is brilliant. I think the author managed to capture teenage angst in Varen. And there's Brad. I don't understand why Isobel didn't call the police on him? He's clearly an abusive pyscho. 
 I think more attention shoud've been paid to the secondary characters who get majorly overlooked and are cardboard cutouts at best. Gwen for example seems to be there for Isobel to use regardless of how she treats her, Alyssa there to be a bitch and Nikki to grovel and tell how jelous she is of Izzy's life, Boring. 
 Finally, a more annoying thing that interfered with my enjoying the book was the plot holes that started around the end. For example, (view spoiler)[ Why did Varen go to the Grim Facade if he was trapped in his alternate reality? If he wasn't trapped why didn't he go say bye to Isobel properly? Whut? (hide spoiler)]