I really enjoyed this book. I thoughy Maddy was a great character. 
 I'm putting the rest under a long gap for spoilers to talk about the things that bugged me. 
 Spoilers: 
 How the hell did Maddy manage to get through airport security? She wouldn't have any drivers license or passport. 
 I spent the entire book thinking "I hope this doesn't turn out like bubble boy where she's never actually sick" When she got sick in Hawaii I was actually excited because wow, she really is sick. 
 NOPE. I do like that her mom's illness was foreshadowed though. 
 Also, the thing with the neighbors, was the house next door just empty for 10 years? Or were there other neighbors who she didn't freak out about when they moved?