This is one of my abosolute favorite books!!! I read it because it was my friend Tess's favorite book. Each chapter was a cliff-hanger and I fell asleep at 12:00 each night I read it because I couldn't stop. Just when you think that everything is going to end up alright, something new is discovered or something terrible happens to throw all of the characters up on the line between everything working out and distaster and chaos. The future (where this book takes place) is filled with dangerous situations, everything from your airship sinking, to pirates, and in this amazing book, everything that can go wrong does.