Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This didn't work for me ...

I am no stranger to historical fiction or mystery fiction, and I know this is controversial opinion, but this book just didn't do it for me. The different narrative voices sounded all the same to me. I found the pace ponderous, the style heavy and self-important, the welding of historical fact and fiction too deliberate, and the plot incredible.