Boy In the Striped Pyjamas .... kept me awake!

On reading this book, I felt enclosed in the lead character's world, where he is powerless to affect his circumstances and where he only gets partial or misinterpreted information.  I felt his frustrations and joys, his hopes his fears.... and dreaded when he is inexorably drawn into... but let's not spoil the end.
A fantastic book dealing skilfully with a very difficult theme, but which manages to entertain as well as inform.