Without a doubt 5 stars. If you love sci-fi and techno babble (like me) then buy this book. Ender is a great character who just seems to roll on with what is happening to him and humanity throughout the book. For me it really picked up from battle school to the bugger showdown. With a neat twist at the end, which i can understand why it was there. very enjoyable and must be read.
Ender's character grows more in speaker for the dead but that book is a lot less sci fi and still a good read. Buy it!!