For a girl (me) that does not read much science fiction this was a tad more Sci Fi then I had hoped. I felt that I did not understand really what they were training for and vague on exactly what was happening when training was described. I understood more what was going on between his brother and sister on their home planet.
This book is being made into a movie soon. They are going have get some pretty unbelievable young person since in the book Ender is only 6 to maybe 12.