While i did enjoy this book, I did take issues with some of it. For starters Manchee was really annoying and while dogs do act that way (apart from talking) i think the dog did throw the story off a little for me. Also censorship did get on my nerves, I don't like it, never have never will; I know that it was bec ause it was a YA book and he didn't want to expose the readers to that, but there is probably a better way to express frustrasion and anger without pretending to curse. 
 Apart from those issues, the book does a great job of progressing the story and held my interest all the way till the end. Its a great YA novel, but be warned cliffhanger at the end will make you want to read the next one pretty much straight away.