Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Confusion in a book

I found this book very heavey going, jumping between past and present so often, it kept me from entering into the story line as well I like. I really couldn't stay focused, I was never sure which period in time that I would be dealing with next. The plots weren't clearly drawn and were always changing, I found the heroine to be strange and left wondering who the true hero was.