Instruct: Classify the given Amazon review as either positive or negative.
Query: bittersweet

The Emanuels have put together a stunningly beautiful book on how they mad the wedding dress of the century. I loved it and yet reading it is a bittersweet experience. Each little stitch, each little detail and addition of tulle and lace moved Diana further down a path to a fraudulent marriage to a man who didn't love her and never would. It's almost as if everyone around her knew what the real score was but no-one wanted to clue in the bride because it wouldn've spoiled the show. Reading A Dress for Diana reminded me that fairy tales can have tragic endings too.