Ender's Game by Orson Scott Card
Well, I was misinformed about when the movie was coming out and so in the last week of September I burned through this book so that I had read it all before seeing the film adaptation. Suffice it to say, I was annoyed when I found out the true release date. But I found the book captivating enough that I probably wouldn't have taken much longer to finish it regardless of when I had started. I thought it was thoroughly enjoyable. Though I could have done without the siblings' subplot.