Instruct: Classify a review into positive or negative sentiment.
Query: The book is hard to follow.

Ender`s Game is hard to follow. It has many characters so it is hard to keep track of who they are and what they do. It has many things that may happen in the future. It has aliens called buggers and they attack the Earth twice and we beat them luckily. I think the book should have more action with the battles in space . I think if you like science fiction you should like this book well.