It's tricky to say anything and not spoil something. If you decide to read reviews on Amazon I have to tell you they spoil the whole book. They revealed a LOT.
Just think global crisis, politics, armies etc.
That's why I like our Jon Snow's reviews, short, straight to the point what's the book about and why he thinks is worth a read. He's reviewing a book, not expressing his feelings about it.
Too bad he's got a job.