Instruct: Classify Amazon reviews into positive or negative sentiment
Query: An Essential Addition to Any Reference Shelf

I love my Roget's Thesaurus, and I use it often in work and correspondence. But there is are times when the words it supplies are - well - a tad too commonplace. Sometimes you need to use a word that conveys subtle shadings of meaning, and other times you just want to use a word to show the other guy how intelligent you really are. That's where The Highly Selective Thesaurus comes in. As a sheer ratio, I probably use this once for every four times I use Rogets, but as a writer friend once told me, you never need a really good, five-dollar word until you need it _badly_. If you are building or adding to your references, you must purchase this and its companion volume, the Highly Selective Dictionary, to accompany your Websters and your Rogets - and even your Encarta.