If you are familiar with Michael Grant's Gone series than Monster takes place four years after the bubble breaks. More meteors are falling down to earth and more humans are changing into mutants, some good some bad, and the government can do nothing about them.
While I admit the Gone series has been on my TBR list for a long time now and I only realized after reading Monster that it was even part of the series. So if you are a hard core Gone fan you might feel different, but I loved the book. Non-stop action, a few twists, but over all the suspense will have you reading well past your bedtime, it was awesome!