Whether we like it or not, people judge us by the words we use. And misuse. The Dirty Thirty is a self-paced workbook that homes in on (not hones in on) the worst offenders, word-pairs that even professional writers and editors sometimes find confusing. It explains the differences between the two words, gives tips for using them correctly, and provides some good memory hooks to keep them locked in place when you use them next month - or next year. Some of the pairs are imply-infer, who-whom, compliment-complement, ingenious-ingenuous, and affect-effect.