I read Junk about 4 years ago when I was 14, and it's been my favourite book ever since. Admittedly I don't think it's a children's book, I'd recommend it to teenagers. However a lot of my adult friends have read it and thoroughly enjoyed it.
I saw this series about 2 years ago, I was really looking forward to it and was disappointed when I saw it. It doesn't do the book justice at all. The actors in this series are a bit wooden and don't seem to be feeling the part too much, and the book is much much more atmospheric. There were also some large parts missed out aswell!
I'm really hoping someone re makes this series into something better, or perhaps even a film. I've seen the stage play and it's excellent!