Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Scholarly and thorough, for nerds who want to know everything about weddings.

I have been using this book in the course of my wedding planning business since 2002. It is absolutely not a how-to-plan-your-wedding type of book. Readers looking for this sort of thing are better off with one of Martha Stewart's tomes. This is, however, a lyrical, poetic, and fascinating study of dozens (maybe hundreds) of wedding traditions and their origins in all world cultures. Along with meditative passages to help you find your own way. It is, as other readers have noted, lacking an index. I never noticed this lacking, as I have read it cover to cover, like a history of weddings from ancient times to the present.