Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very difficult to read

I devour books and I love Fantasy. I couldn't even finish this book - it was so difficult to read. While the world-building was indeed complex, the character-building left a lot to be desired. I hate to waste money and so I was determined to finish it, but after reading a quarter of the book over several readings, I couldn't take it any more.