The book starts off where the last one ended with the arrival of Leo and the whole crew still trying to survive on the island. Kaelyn stumbles across what may be a vaccine left by her father. The crew then goes on a long trek off the island in search of a scientist or medical professional that could replicate the vaccine. 
 I really enjoyed this book and thought it was actually better than the first. This one was written like a regular novel instead of like a journal which was a little disappointing, but I love the story line so much that it definitely did not deter me from reading:-) 
 The incoming of new characters was very exciting and frightening at the same time. No one knew exactly what they would run into once they were off the island. They gained allies as well as some enemies! 
 I can't ruin the book for anyone whom wants to read it, but some members of the crew will not be the same at the end and they will not all be together. Kaelyn really has to keep her wits about her and she learns what it is like to be an adult. All the while trying to make some very adult decisions that may be heart braking for her. 
 The book does not necessarily end on a cliffhanger, but it will leave you DYING to get the next installment! I can't wait to read The Worlds We Make, due out in February 2014!