Hi - trying to remember the title of a book I read when I was around 13/14 years old I think - so aimed at young teenagers I imagine. All I can recall is that it involved a group of people (central character being a teenage boy) going on a journey and the ending centralled around them going up a mountain or a volcano... I don't normally read books twice but I did with this one so hoping it was good enough that someone else read it - any ideas?!!!!