Survival

This is the first book in Chris Ryan's Alpha Force series, which sadly seems to have ended now, as I don't think the Code Red series is anywhere near as good. It's very well written, and quite exciting. A group of teenagers are on what should be a fantastic holiday, working on a sailing boat in the Indonesian Archipalago. However, the five teenagers on A-watch do not get on at all. After angering their watch leader once too often, they end up sitting in a tender and then fall asleep. While they're sleeping, the rope connecting them to the boat snaps and they go floating off. They have to work together to survive. There's a section with survival tips at the end, and it's really pretty interesting. It's worth reading this one first, before any of the others in the series, but after that I think they can be read in pretty much any order. It's not absolutely essential to read this first, but it does set the scene and give you an idea of how Alpha Force first got together.