Drawing on new words from fields that include the internet, politics, and law, 10 Days to a More Powerful Vocabulary will help you:

Develop the right vocabulary for your profession
Distinguish between words that sound or look the same -- from tortuous and torturous to eminent and imminent
Feel comfortable and confident when you use new words
Enrich your vocabulary with words from science, art, and literature
Learn just a few easy word roots to absorb hundreds of related words